21.88% is the change from 512 to 624
Calculation steps:
[( 624 - 512 ) ÷ 512] x 100 = 21.88%
Formula
Percentage change = [(624 - 512) / 512] x 100
Subtract the new number by the original number
624 - 512 = 112
112 ÷ 512 = 0.21875
0.21875 x 100 = 21.88%