43.12% is the change from 538 to 770
Calculation steps:
[( 770 - 538 ) ÷ 538] x 100 = 43.12%
Formula
Percentage change = [(770 - 538) / 538] x 100
Subtract the new number by the original number
770 - 538 = 232
232 ÷ 538 = 0.4312267657992565
0.4312267657992565 x 100 = 43.12%