Question

The price of a computer was decreased by 30% to £147.

What was the price before the decrease?The price of a ring was increased by 9% to £1800. What was the price before the increase? Give your answer to the nearest penny.

Answer 1

a) £210

b) £1651.38

Explanation:

a)

After the reduction, the price is 1 -30% = 0.70 of what it was.

0.7p = £147

p = £147/0.7 = £2.10 . . . price before decrease

__

b)

After the increase, the price is 1 +9% = 1.09 of what it was.

p = £1800/1.09 ≈ £1651.38 . . . price before increase