-60% is the change from 25 to 10
Calculation steps:
[( 10 - 25 ) ÷ 25] x 100 = -60%
Formula
Percentage change = [(10 - 25) / 25] x 100
Subtract the new number by the original number
10 - 25 = -15
-15 ÷ 25 = -0.6
-0.6 x 100 = -60%
Example