84.22% is the change from 450 to 829
Calculation steps:
[( 829 - 450 ) ÷ 450] x 100 = 84.22%
Formula
Percentage change = [(829 - 450) / 450] x 100
Subtract the new number by the original number
829 - 450 = 379
379 ÷ 450 = 0.8422222222222222
0.8422222222222222 x 100 = 84.22%