17.09% is the change from 515 to 603
Calculation steps:
[( 603 - 515 ) ÷ 515] x 100 = 17.09%
Formula
Percentage change = [(603 - 515) / 515] x 100
Subtract the new number by the original number
603 - 515 = 88
88 ÷ 515 = 0.170873786407767
0.170873786407767 x 100 = 17.09%