what is the formula for finding cost price?

1) The price of sugar increases by 25%. By what % must a house-wife reduce her consumption so that the expenditure does not increase.

2) In an examination, 95% of candidates passed and 25 failed. How many candidates appeared for the examination?

Find the ratio of:

(a) Rs 5 to 50 paise (b) 15 kg to 210 g

(c) 9 m to 27 cm (d) 30 days to 36 hours

At what rate percent per annum will a sum of money double in 8 years ?

What amount is 10% more than Rs 90 ?

Find the whole quantity if

(a) 5% of it is 600 (b) 12% of it is 1080

(c) 40% of it is 500 km (d) 70% of it is 14 minutes

(e) 8% of it is 40 litres

Convert each part of the ratio to percentage:

(a) 3:1 (b) 2:3:5 (c) 1:4 (d) 1:2:5

An ore contains 12% copper.how many kilograms of the ore are required to get 69 kg of copper?

1200 soldiers in a fort had enough food for 28 days.After 4 days some soldiers were transferred to another fort and thus the food lasted for an extra 32 days .How many soldiers left the fort?

The perimeter of a circle is equal to that of a square. Their areas are in the ratio of ____.

A vendor purchased 40 dozens bananas for Rs250. Out of these 30 bananas were rotten and could not be sold. At what rate per dozen should he sell the remaining bananas to make a profit of 20%.

Juhi sells a washing machine for Rs 13, 500. She loses 20% in the bargain. What was the price at which she bought it?Can you please explain it in a simple manner.

A number exceeds 20% of itself by 40.What is the number?

a:b=2:3

b:c=4:5

then a:c=

what is the formula for finding cost price?1) The price of sugar increases by 25%. By what % must a house-wife reduce her consumption so that the expenditure does not increase.

2) In an examination, 95% of candidates passed and 25 failed. How many candidates appeared for the examination?

Find the ratio of:

(a) Rs 5 to 50 paise (b) 15 kg to 210 g

(c) 9 m to 27 cm (d) 30 days to 36 hours

At what rate percent per annum will a sum of money double in 8 years ?

What amount is 10% more than Rs 90 ?

Find the whole quantity if

(a) 5% of it is 600 (b) 12% of it is 1080

(c) 40% of it is 500 km (d) 70% of it is 14 minutes

(e) 8% of it is 40 litres

Convert each part of the ratio to percentage:

(a) 3:1 (b) 2:3:5 (c) 1:4 (d) 1:2:5

An ore contains 12% copper.how many kilograms of the ore are required to get 69 kg of copper?

1200 soldiers in a fort had enough food for 28 days.After 4 days some soldiers were transferred to another fort and thus the food lasted for an extra 32 days .How many soldiers left the fort?

The perimeter of a circle is equal to that of a square. Their areas are in the ratio of ____.

A vendor purchased 40 dozens bananas for Rs250. Out of these 30 bananas were rotten and could not be sold. At what rate per dozen should he sell the remaining bananas to make a profit of 20%.

Juhi sells a washing machine for Rs 13, 500. She loses 20% in the bargain. What was the price at which she bought it?Can you please explain it in a simple manner.

A number exceeds 20% of itself by 40.What is the number?

a:b=2:3

b:c=4:5

then a:c=