The Cost price of 18 apples is equal to selling price of 15 apples. Find the gain or loss percent.
Solution: 1st method : Let C.P. of each apple be Re. 1.
then, C.P. of 18 apples = Rs. 18. So, S.P. of 15 apples = Rs. 18.
.'. Gain% = (3/15 * 100) = 20%.
2nd Method : Cost price of x apples is equal to the selling price of y apples then the loss or gain percent is :
(x - y)*100/y according as - or + sign.
gain percent or loss percent depend on cost price so g/cp*100
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