81.4% is the change from 457 to 829
Calculation steps:
[( 829 - 457 ) ÷ 457] x 100 = 81.4%
Formula
Percentage change = [(829 - 457) / 457] x 100
Subtract the new number by the original number
829 - 457 = 372
372 ÷ 457 = 0.8140043763676149
0.8140043763676149 x 100 = 81.4%