93.35% is the change from 421 to 814
Calculation steps:
[( 814 - 421 ) ÷ 421] x 100 = 93.35%
Formula
Percentage change = [(814 - 421) / 421] x 100
Subtract the new number by the original number
814 - 421 = 393
393 ÷ 421 = 0.9334916864608076
0.9334916864608076 x 100 = 93.35%