92.64% is the change from 421 to 811
Calculation steps:
[( 811 - 421 ) ÷ 421] x 100 = 92.64%
Formula
Percentage change = [(811 - 421) / 421] x 100
Subtract the new number by the original number
811 - 421 = 390
390 ÷ 421 = 0.9263657957244655
0.9263657957244655 x 100 = 92.64%