120% is the change from 420 to 924
Calculation steps:
[( 924 - 420 ) ÷ 420] x 100 = 120%
Formula
Percentage change = [(924 - 420) / 420] x 100
Subtract the new number by the original number
924 - 420 = 504
504 ÷ 420 = 1.2
1.2 x 100 = 120%
Example