Answer: Percentage change =20 % decrease
Step-by-step 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
=
=20 %
Hence percentage change in price = 20% decrease