-75.83% is the change from 331 to 80
Calculation steps:
[( 80 - 331 ) ÷ 331] x 100 = -75.83%
Formula
Percentage change = [(80 - 331) / 331] x 100
Subtract the new number by the original number
80 - 331 = -251
-251 ÷ 331 = -0.7583081570996979
-0.7583081570996979 x 100 = -75.83%