84.26% is the change from 451 to 831
Calculation steps:
[( 831 - 451 ) ÷ 451] x 100 = 84.26%
Formula
Percentage change = [(831 - 451) / 451] x 100
Subtract the new number by the original number
831 - 451 = 380
380 ÷ 451 = 0.8425720620842572
0.8425720620842572 x 100 = 84.26%