-27.21% is the change from 577 to 420
Calculation steps:
[( 420 - 577 ) ÷ 577] x 100 = -27.21%
Formula
Percentage change = [(420 - 577) / 577] x 100
Subtract the new number by the original number
420 - 577 = -157
-157 ÷ 577 = -0.2720970537261698
-0.2720970537261698 x 100 = -27.21%