Question

toffee was bought at 15 for 20 how many would be sold for rs 20 to gain 25percent

Answer 1

From the selling price and percentage profit we can get the buying price :

The buying price is 100% whereas the selling price is 125% since the gain is 25%.

Hence Buying price is :

100/125 × 20 = 16

The buying price for each toffee was :

20/15 = Rs 4/3

To get the number of apples sold we get the total buying price divide by the buying price for one toffee.

16 ÷ 4/3

16 × 3/4 = 12

12 toffees