Mathematics Semester ii Solutions Solutions for Class 7 Math Chapter 1 Decimal And Percentage are provided here with simple step-by-step explanations. These solutions for Decimal And Percentage are extremely popular among class 7 students for Math Decimal And Percentage Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Mathematics Semester ii Solutions Book of class 7 Math Chapter 1 are provided here for you for free. You will also love the ad-free experience on Meritnationâ€™s Mathematics Semester ii Solutions Solutions. All Mathematics Semester ii Solutions Solutions for class 7 Math are prepared by experts and are 100% accurate.

#### Page No 3:

#### Question O1:

**Express the following fractions in decimal form.**

#### Answer:

Following are the decimal forms of the given fractions:

(1)

(2)

(3)

(4)

#### Page No 3:

#### Question W1:

Convert the following fractions into decimals.

#### Answer:

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

#### Page No 3:

#### Question O2:

**Express the following decimals in fractional form.**

#### Answer:

Following are the fractional forms of the given decimals:

(1)

(2)

(3)

(4)

#### Page No 3:

#### Question W2:

Express the following as fractions.

#### Answer:

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

#### Page No 8:

#### Question O1:

**Express the following fractions as percentage.**

#### Answer:

(1)

(2)

(3)

(4)

#### Page No 8:

#### Question W1:

**Convert the following fractions into percentage.**

#### Answer:

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

#### Page No 8:

#### Question O2:

**Express the following percentages in fractional form.**

#### Answer:

(1)

(2)

(3)

(4)

#### Page No 8:

#### Question W2:

**Convert the following decimals into percentage.**

#### Answer:

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

#### Page No 8:

#### Question W3:

**Express the following percentages in fractions and decimals.**

#### Answer:

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

#### Page No 8:

#### Question W4:

**Find the values of:**

#### Answer:

(1)

25% of Rs.350

(2)

20% of 8 hr

(3) 15% of 18 km

(4) 5% of 60ps

(5) 115% of 250

#### Page No 8:

#### Question W5.4:

**Solve the following.**

The sales tax on toys is 4%. If the cost of a toy is Rs. 80/-, find the amount of tax to be paid.

#### Answer:

Amount of tax to be paid

#### Page No 8:

#### Question W5.3:

**Solve the following.**

Out of 700 students in a school, 6% were absent on a particular day. How many were absent?

#### Answer:

Number of students absent

#### Page No 8:

#### Question W5.2:

**Solve the following.**

50% of a number is 10. Find the number.

#### Answer:

Let the number be *x*.

#### Page No 8:

#### Question W5.1:

**Solve the following.**

30% of which number is 21?

#### Answer:

Let the number be *x*.

#### Page No 8:

#### Question W5.5:

**Solve the following.**

There are 60 students in VII std. class. 30% of them are girls. Find the strength of boys.

#### Answer:

30% of students are girls.

Thus, 70% of students are boys.

Number of boys

#### Page No 9:

#### Question W5.15:

**Solve the following.**

Math the following as shown in the example.

#### Answer:

A |
B |
C |

(a) |
(h) |
(k) |

(b) |
(f) |
(o) |

(c) |
(i) |
(m) |

(d) |
(j) |
(l) |

e) |
(g) |
(n) |

#### Page No 9:

#### Question W5.14:

**Solve the following.**

The salary of Rama is Rs. 3,600/- per month. She gets an increment of of her salary. What is her salary after the increment?

#### Answer:

Salary of Rama = Rs.3600

Increment

= of Rama’s salary

Rama’s salary after the increment = Rs.3600 + Rs.90 = Rs.3690

#### Page No 9:

#### Question W5.12:

**Solve the following.**

Hussain Saheb purchases 250 mangoes. 12% of the mangoes are rotten and 10% are damaged. How many mangoes are in good condition?

#### Answer:

Percentage of mangoes in good condition

Number of mangoes in good condition

#### Page No 9:

#### Question W5.11:

**Solve the following.**

Patil scores 75% out of 800 marks. How many marks has he lost?

#### Answer:

Percentage of marks scored by Patil = 75%

Percentage of marks lost by Patil = 100-75 = 25%

Marks lost by Patil

#### Page No 9:

#### Question W5.10:

**Solve the following.**

130 students participate in an essay competition. If 26 students win prizes, find the percentage of winners.

#### Answer:

Percentage of winners

#### Page No 9:

#### Question W5.9:

**Solve the following.**

There are 60 questions in a question paper. If Chandra answers 90% of them, how many questions has she answered?

#### Answer:

Number of questions Chandra answered

#### Page No 9:

#### Question W5.8:

**Solve the following.**

In a train, 15% of the people travel in air-conditioned compartments and 35% travel in I class compartments. The remaining people travel in II class compartments. Find the percentage of people travelling in II Class compartments.

#### Answer:

Percentage of people travelling in II Class compartments

#### Page No 9:

#### Question W5.7:

**Solve the following.**

There are 25,000 books in a library. If 15% of them are reference books, find the number of reference books in the library.

#### Answer:

Number of reference books in the library

#### Page No 9:

#### Question W5.6:

**Solve the following.**

A person saves 12% of his salary every month. If his salary is Rs. 2,500/- what is his expenditure?

#### Answer:

Savings = 12% of salary

∴ Expenditure = 88% of salary

Salary = Rs.2,500

Expenditure

#### Page No 9:

#### Question W5.13:

**Solve the following.**

The hockey team of a school won 12 matches and lost 3 matches. Express the number of matches won in percentage.

#### Answer:

Number of matches won =12

Number of matches lost =3

Total number of matches = 12 + 3= 15

Percentage of matches won

#### Page No 11:

#### Question W1:

**Solve the following:**

The weights of vegetables brought to Farmers Co-operative Marketing Society are-beans 120.75kg, potatoes 208.90kg, pumpkin 210.55kg and tomatoes 96.45kg. Find the total weight of the vegetables.

#### Answer:

Total weight of the vegetables

#### Page No 11:

#### Question W2:

**Solve the following:**

The amounts collected by cheque in a Rural Bank from Monday to Saturday are Rs. 2,051.80; Rs. 4,505.95; Rs. 8,070.60; Rs. 12,050.40; Rs. 6,500 and Rs. 5,063.25. Find the total amount collected.

#### Answer:

Total amount collected

#### Page No 11:

#### Question W3:

**Solve the following:**

A piece of 22.75m is cut from a cloth of length 35m. What is the length of the cloth remaining?

#### Answer:

Length of the remaining cloth

#### Page No 11:

#### Question W4:

**Solve the following:**

The maximum and minimum temperatures in a day are 35.1°C and 29.4°C respectively. Find the difference.

#### Answer:

Difference between the two temperatures

#### Page No 11:

#### Question W5:

**Solve the following:**

From a sugarcane of length 8m, two pieces measuring 2.5m and 3.75m are cut off. Find the length of the remaining piece of sugarcane.

#### Answer:

Length of the sugarcane remaining

#### Page No 11:

#### Question W6:

**Solve the following:**

The weight of one bag of wheat is 85.45kg. Find the total weight of 32 such bags.

#### Answer:

Weight of one bag of wheat = 85.45 kg

Total weight of 32 such bags = 32×85.45= 2,734.40 kg

#### Page No 12:

#### Question W7:

**Solve the following:**

The strength of a class is 44. The length of cloth required for a set of uniform is 3.25m. The cost of a metre of cloth is Rs. 42.75. Find the amount required to buy the cloth for all the students in the class.

#### Answer:

Strength of a class = 44

Length of cloth required for a set of uniform = 3.25 m

Cost of 1m of cloth = Rs.42.75

Amount required to buy the cloth for all students in the class

= 44×42.75×3.25

= Rs.6,113.25

#### Page No 12:

#### Question W8:

**Solve the following:**

The total area of a field is 69.25 acres. If Thomas buys 43.32kg of manure per acre, find the total weight of manure required.

#### Answer:

Total weight of manure required = 43.32×69.25 = 2,999.91 kg

#### Page No 12:

#### Question W9:

**Solve the following:**

The amount available to be distributed among 9 students who have secured first place in sports is Rs.678.60. What is the amount each student gets?

#### Answer:

Amount each student gets

#### Page No 12:

#### Question W11:

**Solve the following:**

When wooden planks are piled, the total thickness of the pile is 38.7 cm. If the thickness of each plank is 0.9cm, how many planks are there in the pile?

#### Answer:

Number of planks in the pile

#### Page No 12:

#### Question W10:

**Solve the following:**

Byre Gowda earns Rs.400/- by selling bananas, at the rate of Rs. 12.50 per kg. Find the total weight of bananas sold by him.

#### Answer:

Total weight of bananas sold by Gowda

#### Page No 12:

#### Question W12:

**Solve the following:**

0.4 part of a window is painted black and 0.52 part is painted white. The remaining portion has to be painted red. Find the part of the window to be painted red.

#### Answer:

Part of the window to be painted red

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