-85.62% is the change from 577 to 83
Calculation steps:
[( 83 - 577 ) ÷ 577] x 100 = -85.62%
Formula
Percentage change = [(83 - 577) / 577] x 100
Subtract the new number by the original number
83 - 577 = -494
-494 ÷ 577 = -0.8561525129982669
-0.8561525129982669 x 100 = -85.62%