-80.13% is the change from 156 to 31
Calculation steps:
[( 31 - 156 ) ÷ 156] x 100 = -80.13%
Formula
Percentage change = [(31 - 156) / 156] x 100
Subtract the new number by the original number
31 - 156 = -125
-125 ÷ 156 = -0.8012820512820513
-0.8012820512820513 x 100 = -80.13%