94.31% is the change from 422 to 820
Calculation steps:
[( 820 - 422 ) ÷ 422] x 100 = 94.31%
Formula
Percentage change = [(820 - 422) / 422] x 100
Subtract the new number by the original number
820 - 422 = 398
398 ÷ 422 = 0.943127962085308
0.943127962085308 x 100 = 94.31%