Question

A man bought 20 article at rs 25 and sold 30 articles at rs 45 what is the loss or gain percentage

Answer 1

20% gain in whole transaction

Answer 2

CP of 20 articles = 25

CP of 1 article = 25/20 = 5/4

SP of 30 articles = 45

SP of 1 article = 45/30 = 3/2

SP is greater hence profit

So Profit = SP - CP = 3/2 - 5/4 = (6-5)/4 = 1/4

Profit % = profit/CP x 100 = 4/20 x 100 = 20%