111.9% is the change from 420 to 890
Calculation steps:
[( 890 - 420 ) ÷ 420] x 100 = 111.9%
Formula
Percentage change = [(890 - 420) / 420] x 100
Subtract the new number by the original number
890 - 420 = 470
470 ÷ 420 = 1.119047619047619
1.119047619047619 x 100 = 111.9%