86.1% is the change from 446 to 830
Calculation steps:
[( 830 - 446 ) ÷ 446] x 100 = 86.1%
Formula
Percentage change = [(830 - 446) / 446] x 100
Subtract the new number by the original number
830 - 446 = 384
384 ÷ 446 = 0.8609865470852018
0.8609865470852018 x 100 = 86.1%