-28% is the change from 25 to 18
Calculation steps:
[( 18 - 25 ) ÷ 25] x 100 = -28%
Formula
Percentage change = [(18 - 25) / 25] x 100
Subtract the new number by the original number
18 - 25 = -7
-7 ÷ 25 = -0.28
-0.28 x 100 = -28%
Example