21.91% is the change from 502 to 612
Calculation steps:
[( 612 - 502 ) ÷ 502] x 100 = 21.91%
Formula
Percentage change = [(612 - 502) / 502] x 100
Subtract the new number by the original number
612 - 502 = 110
110 ÷ 502 = 0.21912350597609562
0.21912350597609562 x 100 = 21.91%