81.37% is the change from 451 to 818
Calculation steps:
[( 818 - 451 ) ÷ 451] x 100 = 81.37%
Formula
Percentage change = [(818 - 451) / 451] x 100
Subtract the new number by the original number
818 - 451 = 367
367 ÷ 451 = 0.8137472283813747
0.8137472283813747 x 100 = 81.37%