-81.96% is the change from 643 to 116
Calculation steps:
[( 116 - 643 ) ÷ 643] x 100 = -81.96%
Formula
Percentage change = [(116 - 643) / 643] x 100
Subtract the new number by the original number
116 - 643 = -527
-527 ÷ 643 = -0.8195956454121306
-0.8195956454121306 x 100 = -81.96%