-21.14% is the change from 577 to 455
Calculation steps:
[( 455 - 577 ) ÷ 577] x 100 = -21.14%
Formula
Percentage change = [(455 - 577) / 577] x 100
Subtract the new number by the original number
455 - 577 = -122
-122 ÷ 577 = -0.21143847487001732
-0.21143847487001732 x 100 = -21.14%