18.83% is the change from 515 to 612
Calculation steps:
[( 612 - 515 ) ÷ 515] x 100 = 18.83%
Formula
Percentage change = [(612 - 515) / 515] x 100
Subtract the new number by the original number
612 - 515 = 97
97 ÷ 515 = 0.1883495145631068
0.1883495145631068 x 100 = 18.83%