On reducing the marked price of his goods by ₹28, a shopkeeper gains 20%. If the cost price of the article be ₹560 and it is sold at the marked price, what will be the gain per cent?

25%

Gain = 20%

Cost price = 560

The marked price of goods was reduced by Rs28

20 = \(\frac{S.P. - 560}{560}\)  × 100  = S.P. = 672

So, marked price = 672 + 28 = 700

New S.P. = 700.

Gain = 700 – 560 = 140.

Gain % = \(\frac{140}{560}\) × 100 = 25%