Question

A price is decreased from £800 to £640. Calculate the percentage change.

Answer 1

Answer: Percentage change =20 % decrease

Explanation:

Given original price =£800

New price= £640

Now change in price = £800 - £640

= £160

Since the new value is less than the old value so the percentage change will be negative i.e. decrease in percentage

Percentage change = (Change in Price/ Original Price)× 100

% change= (£160/£800)×100

=
`(1)/(5)* 100`

=20 %

Hence percentage change in price = 20% decrease

Answer 2

There is a decrease of 20% from ÂŁ800 to ÂŁ640.

A change from 800 to 640 represents a negative change (decrease) of -20% Using the formula :

Percent change = [(800 - 640) / 800] x 100 = -20 % (decrease)

800 is the old value and 640 is the new value. In this case we have a negative change (decrease) of -20 percent because the new value is smaller than the old value.