27.22% is the change from 507 to 645
Calculation steps:
[( 645 - 507 ) ÷ 507] x 100 = 27.22%
Formula
Percentage change = [(645 - 507) / 507] x 100
Subtract the new number by the original number
645 - 507 = 138
138 ÷ 507 = 0.27218934911242604
0.27218934911242604 x 100 = 27.22%