(a)Seema baked a cake . For every 160grams of butter she used 200grams of flour and 120grams of sugar . What is the ratio of  : (a) flour to butter? (b) flour to sugar? (c) butter to sugar ? .                                                   (b)    If Seema used 192grams of ingredients , how much of each item did she use ?  solve and anwer both of the questions                                                                                    

For 160 g of butter Seema used 200 g of flour

 For 1 g of butter , flour used = 200/160
 For 192 g of butter,  flour used = (200 x 192)/160 = 240 g
Ratio of floor to butter = 240:192 =5:4

 For 160 g of butter Seema used 120 g of sugar

 For 1 g of butter sugar used =120/160
 For 192 g of butter sugar used = (120 x 192)/160 =144 g
​so ratio of butter to sugar = 192:144 = 4:3
$$\begin{gathered} \mathrm{Now} \mathrm{floor} : \mathrm{butter} = 5:4 \\ \mathrm{and} \mathrm{butter}: \mathrm{sugar} = 4:3 \\ \mathrm{So} \mathrm{floor} : \mathrm{sugar}= 5:3 \end{gathered}$$
Similarly try second part for your own practise.