-27.04% is the change from 577 to 421
Calculation steps:
[( 421 - 577 ) ÷ 577] x 100 = -27.04%
Formula
Percentage change = [(421 - 577) / 577] x 100
Subtract the new number by the original number
421 - 577 = -156
-156 ÷ 577 = -0.2703639514731369
-0.2703639514731369 x 100 = -27.04%