20.97% is the change from 515 to 623
Calculation steps:
[( 623 - 515 ) ÷ 515] x 100 = 20.97%
Formula
Percentage change = [(623 - 515) / 515] x 100
Subtract the new number by the original number
623 - 515 = 108
108 ÷ 515 = 0.20970873786407768
0.20970873786407768 x 100 = 20.97%