-91.22% is the change from 877 to 77
Calculation steps:
[( 77 - 877 ) ÷ 877] x 100 = -91.22%
Formula
Percentage change = [(77 - 877) / 877] x 100
Subtract the new number by the original number
77 - 877 = -800
-800 ÷ 877 = -0.9122006841505131
-0.9122006841505131 x 100 = -91.22%