-31.75% is the change from 126 to 86
Calculation steps:
[( 86 - 126 ) ÷ 126] x 100 = -31.75%
Formula
Percentage change = [(86 - 126) / 126] x 100
Subtract the new number by the original number
86 - 126 = -40
-40 ÷ 126 = -0.31746031746031744
-0.31746031746031744 x 100 = -31.75%