116.39% is the change from 421 to 911
Calculation steps:
[( 911 - 421 ) ÷ 421] x 100 = 116.39%
Formula
Percentage change = [(911 - 421) / 421] x 100
Subtract the new number by the original number
911 - 421 = 490
490 ÷ 421 = 1.163895486935867
1.163895486935867 x 100 = 116.39%