23.5% is the change from 515 to 636
Calculation steps:
[( 636 - 515 ) ÷ 515] x 100 = 23.5%
Formula
Percentage change = [(636 - 515) / 515] x 100
Subtract the new number by the original number
636 - 515 = 121
121 ÷ 515 = 0.23495145631067962
0.23495145631067962 x 100 = 23.5%