21.17% is the change from 515 to 624
Calculation steps:
[( 624 - 515 ) ÷ 515] x 100 = 21.17%
Formula
Percentage change = [(624 - 515) / 515] x 100
Subtract the new number by the original number
624 - 515 = 109
109 ÷ 515 = 0.21165048543689322
0.21165048543689322 x 100 = 21.17%