90.91% is the change from 429 to 819
Calculation steps:
[( 819 - 429 ) ÷ 429] x 100 = 90.91%
Formula
Percentage change = [(819 - 429) / 429] x 100
Subtract the new number by the original number
819 - 429 = 390
390 ÷ 429 = 0.9090909090909091
0.9090909090909091 x 100 = 90.91%