123.81% is the change from 420 to 940
Calculation steps:
[( 940 - 420 ) ÷ 420] x 100 = 123.81%
Formula
Percentage change = [(940 - 420) / 420] x 100
Subtract the new number by the original number
940 - 420 = 520
520 ÷ 420 = 1.2380952380952381
1.2380952380952381 x 100 = 123.81%