3.59% is the change from 557 to 577
Calculation steps:
[( 577 - 557 ) ÷ 557] x 100 = 3.59%
Formula
Percentage change = [(577 - 557) / 557] x 100
Subtract the new number by the original number
577 - 557 = 20
20 ÷ 557 = 0.03590664272890485
0.03590664272890485 x 100 = 3.59%