91.59% is the change from 428 to 820
Calculation steps:
[( 820 - 428 ) ÷ 428] x 100 = 91.59%
Formula
Percentage change = [(820 - 428) / 428] x 100
Subtract the new number by the original number
820 - 428 = 392
392 ÷ 428 = 0.9158878504672897
0.9158878504672897 x 100 = 91.59%