-87.89% is the change from 636 to 77
Calculation steps:
[( 77 - 636 ) ÷ 636] x 100 = -87.89%
Formula
Percentage change = [(77 - 636) / 636] x 100
Subtract the new number by the original number
77 - 636 = -559
-559 ÷ 636 = -0.8789308176100629
-0.8789308176100629 x 100 = -87.89%