91.9% is the change from 420 to 806
Calculation steps:
[( 806 - 420 ) ÷ 420] x 100 = 91.9%
Formula
Percentage change = [(806 - 420) / 420] x 100
Subtract the new number by the original number
806 - 420 = 386
386 ÷ 420 = 0.919047619047619
0.919047619047619 x 100 = 91.9%