-90.7% is the change from 828 to 77
Calculation steps:
[( 77 - 828 ) ÷ 828] x 100 = -90.7%
Formula
Percentage change = [(77 - 828) / 828] x 100
Subtract the new number by the original number
77 - 828 = -751
-751 ÷ 828 = -0.9070048309178744
-0.9070048309178744 x 100 = -90.7%