Question

If the price of a watch is increased by 15% the increase in price is rupees 90 . What was the price earlier?

Answer 1

89.85 because we can let the value of watch be x . then x + 15/100 = 90 
x = 8985/100 = 89.85

Answer 2

let the earlier price was x
increased by 15% = 15x/100
According to question
x+ 15x/100=90
(100x+15x)/100=90
115x=90*100
115x=9000
x=78.2