-80% is the change from 25 to 5
Calculation steps:
[( 5 - 25 ) ÷ 25] x 100 = -80%
Formula
Percentage change = [(5 - 25) / 25] x 100
Subtract the new number by the original number
5 - 25 = -20
-20 ÷ 25 = -0.8
-0.8 x 100 = -80%
Example