-36.03% is the change from 136 to 87
Calculation steps:
[( 87 - 136 ) ÷ 136] x 100 = -36.03%
Formula
Percentage change = [(87 - 136) / 136] x 100
Subtract the new number by the original number
87 - 136 = -49
-49 ÷ 136 = -0.3602941176470588
-0.3602941176470588 x 100 = -36.03%