Question

the price of an article worth Rs 150 increases in the ratio 5:7 find its new price

Answer 1

let the old price be 5x
then
5x=150
x=30
And new price is 7x
then
7×30=210
210 is the new price

Answer 2

A/Q, 7 x - 5 x = 150

2 x = 150

x = 75

New price = 7 x 75 =   525