Question

the selling price of 10 articles is equal to the cost price of 11 articles . find the gain %.

Answer 1

Let the cost price of a article = x
cost price of 11 articles = 11x

So selling price of 10 articles = 11x
SP of one article = 11x/10 = 1.1x
gain = 1.1x - x = 0.1x

gain% = 0.1x/x * 100 = 10%