-98.79% is the change from 577 to 7
Calculation steps:
[( 7 - 577 ) ÷ 577] x 100 = -98.79%
Formula
Percentage change = [(7 - 577) / 577] x 100
Subtract the new number by the original number
7 - 577 = -570
-570 ÷ 577 = -0.9878682842287695
-0.9878682842287695 x 100 = -98.79%