15.56% is the change from 540 to 624
Calculation steps:
[( 624 - 540 ) ÷ 540] x 100 = 15.56%
Formula
Percentage change = [(624 - 540) / 540] x 100
Subtract the new number by the original number
624 - 540 = 84
84 ÷ 540 = 0.15555555555555556
0.15555555555555556 x 100 = 15.56%