-72.81% is the change from 331 to 90
Calculation steps:
[( 90 - 331 ) ÷ 331] x 100 = -72.81%
Formula
Percentage change = [(90 - 331) / 331] x 100
Subtract the new number by the original number
90 - 331 = -241
-241 ÷ 331 = -0.7280966767371602
-0.7280966767371602 x 100 = -72.81%