Question

A man purchased a watch for Rs. 400 and sold it at a gain of 20% of the selling price. The selling price of the watch is:

Answer 1

CP of watch=Rs 400
gain%=20%
SP=?
SP=CP { 100+gain%/100}
SP=400{100+20/100}
=Rs 480


hope it helps

Answer 2

Answer:

CP=400

Profit=20%

SP=CP×100+profit ÷100

400×100+20÷100=480