-4.68% is the change from 577 to 550
Calculation steps:
[( 550 - 577 ) ÷ 577] x 100 = -4.68%
Formula
Percentage change = [(550 - 577) / 577] x 100
Subtract the new number by the original number
550 - 577 = -27
-27 ÷ 577 = -0.04679376083188908
-0.04679376083188908 x 100 = -4.68%