-81.71% is the change from 645 to 118
Calculation steps:
[( 118 - 645 ) ÷ 645] x 100 = -81.71%
Formula
Percentage change = [(118 - 645) / 645] x 100
Subtract the new number by the original number
118 - 645 = -527
-527 ÷ 645 = -0.8170542635658915
-0.8170542635658915 x 100 = -81.71%