-74.02% is the change from 331 to 86
Calculation steps:
[( 86 - 331 ) ÷ 331] x 100 = -74.02%
Formula
Percentage change = [(86 - 331) / 331] x 100
Subtract the new number by the original number
86 - 331 = -245
-245 ÷ 331 = -0.7401812688821753
-0.7401812688821753 x 100 = -74.02%