-20.97% is the change from 577 to 456
Calculation steps:
[( 456 - 577 ) ÷ 577] x 100 = -20.97%
Formula
Percentage change = [(456 - 577) / 577] x 100
Subtract the new number by the original number
456 - 577 = -121
-121 ÷ 577 = -0.2097053726169844
-0.2097053726169844 x 100 = -20.97%