-25% is the change from 156 to 117
Calculation steps:
[( 117 - 156 ) ÷ 156] x 100 = -25%
Formula
Percentage change = [(117 - 156) / 156] x 100
Subtract the new number by the original number
117 - 156 = -39
-39 ÷ 156 = -0.25
-0.25 x 100 = -25%
Example