84.04% is the change from 451 to 830
Calculation steps:
[( 830 - 451 ) ÷ 451] x 100 = 84.04%
Formula
Percentage change = [(830 - 451) / 451] x 100
Subtract the new number by the original number
830 - 451 = 379
379 ÷ 451 = 0.8403547671840355
0.8403547671840355 x 100 = 84.04%