-79.76% is the change from 331 to 67
Calculation steps:
[( 67 - 331 ) ÷ 331] x 100 = -79.76%
Formula
Percentage change = [(67 - 331) / 331] x 100
Subtract the new number by the original number
67 - 331 = -264
-264 ÷ 331 = -0.797583081570997
-0.797583081570997 x 100 = -79.76%