116.9% is the change from 420 to 911
Calculation steps:
[( 911 - 420 ) ÷ 420] x 100 = 116.9%
Formula
Percentage change = [(911 - 420) / 420] x 100
Subtract the new number by the original number
911 - 420 = 491
491 ÷ 420 = 1.1690476190476191
1.1690476190476191 x 100 = 116.9%