19.57% is the change from 557 to 666
Calculation steps:
[( 666 - 557 ) ÷ 557] x 100 = 19.57%
Formula
Percentage change = [(666 - 557) / 557] x 100
Subtract the new number by the original number
666 - 557 = 109
109 ÷ 557 = 0.19569120287253142
0.19569120287253142 x 100 = 19.57%