55.48% is the change from 557 to 866
Calculation steps:
[( 866 - 557 ) ÷ 557] x 100 = 55.48%
Formula
Percentage change = [(866 - 557) / 557] x 100
Subtract the new number by the original number
866 - 557 = 309
309 ÷ 557 = 0.5547576301615799
0.5547576301615799 x 100 = 55.48%