-82.71% is the change from 642 to 111
Calculation steps:
[( 111 - 642 ) ÷ 642] x 100 = -82.71%
Formula
Percentage change = [(111 - 642) / 642] x 100
Subtract the new number by the original number
111 - 642 = -531
-531 ÷ 642 = -0.8271028037383178
-0.8271028037383178 x 100 = -82.71%