18.64% is the change from 515 to 611
Calculation steps:
[( 611 - 515 ) ÷ 515] x 100 = 18.64%
Formula
Percentage change = [(611 - 515) / 515] x 100
Subtract the new number by the original number
611 - 515 = 96
96 ÷ 515 = 0.18640776699029127
0.18640776699029127 x 100 = 18.64%