91.14% is the change from 429 to 820
Calculation steps:
[( 820 - 429 ) ÷ 429] x 100 = 91.14%
Formula
Percentage change = [(820 - 429) / 429] x 100
Subtract the new number by the original number
820 - 429 = 391
391 ÷ 429 = 0.9114219114219114
0.9114219114219114 x 100 = 91.14%