-35.9% is the change from 156 to 100
Calculation steps:
[( 100 - 156 ) ÷ 156] x 100 = -35.9%
Formula
Percentage change = [(100 - 156) / 156] x 100
Subtract the new number by the original number
100 - 156 = -56
-56 ÷ 156 = -0.358974358974359
-0.358974358974359 x 100 = -35.9%