-55.46% is the change from 577 to 257
Calculation steps:
[( 257 - 577 ) ÷ 577] x 100 = -55.46%
Formula
Percentage change = [(257 - 577) / 577] x 100
Subtract the new number by the original number
257 - 577 = -320
-320 ÷ 577 = -0.5545927209705372
-0.5545927209705372 x 100 = -55.46%