Question

If the price of sugar is increased by 25% today; by what percent should it be decreased tomorrow to bring the price back to the original?

Answer 1

Let original price of sugar = rs.100
∴ Price of sugar for today
= Rs.100 + Rs.25
= Rs.125
In order to bring down the price to original
i.e. Rs.100, its price should be decreased by
= Rs.125 - Rs100
= Rs.25
∴ On Rs.125, the price should be decreased by
= Rs.25
On Rs.1, the price should be decreased by 
= Rs.`(25)/(125)`
On Rs.100, the price should be decreased by
= Rs.`(25)/(125)xx 100`

= Rs.`(1)/(5)xx 100`
= Rs.20
∴ Price should be decreased by 20%