48.57% is the change from 420 to 624
Calculation steps:
[( 624 - 420 ) ÷ 420] x 100 = 48.57%
Formula
Percentage change = [(624 - 420) / 420] x 100
Subtract the new number by the original number
624 - 420 = 204
204 ÷ 420 = 0.4857142857142857
0.4857142857142857 x 100 = 48.57%