91.12% is the change from 428 to 818
Calculation steps:
[( 818 - 428 ) ÷ 428] x 100 = 91.12%
Formula
Percentage change = [(818 - 428) / 428] x 100
Subtract the new number by the original number
818 - 428 = 390
390 ÷ 428 = 0.9112149532710281
0.9112149532710281 x 100 = 91.12%