109.52% is the change from 420 to 880
Calculation steps:
[( 880 - 420 ) ÷ 420] x 100 = 109.52%
Formula
Percentage change = [(880 - 420) / 420] x 100
Subtract the new number by the original number
880 - 420 = 460
460 ÷ 420 = 1.0952380952380953
1.0952380952380953 x 100 = 109.52%