38.24% is the change from 557 to 770
Calculation steps:
[( 770 - 557 ) ÷ 557] x 100 = 38.24%
Formula
Percentage change = [(770 - 557) / 557] x 100
Subtract the new number by the original number
770 - 557 = 213
213 ÷ 557 = 0.38240574506283664
0.38240574506283664 x 100 = 38.24%