-86.66% is the change from 577 to 77
Calculation steps:
[( 77 - 577 ) ÷ 577] x 100 = -86.66%
Formula
Percentage change = [(77 - 577) / 577] x 100
Subtract the new number by the original number
77 - 577 = -500
-500 ÷ 577 = -0.8665511265164645
-0.8665511265164645 x 100 = -86.66%