91.21% is the change from 421 to 805
Calculation steps:
[( 805 - 421 ) ÷ 421] x 100 = 91.21%
Formula
Percentage change = [(805 - 421) / 421] x 100
Subtract the new number by the original number
805 - 421 = 384
384 ÷ 421 = 0.9121140142517815
0.9121140142517815 x 100 = 91.21%