80.71% is the change from 451 to 815
Calculation steps:
[( 815 - 451 ) ÷ 451] x 100 = 80.71%
Formula
Percentage change = [(815 - 451) / 451] x 100
Subtract the new number by the original number
815 - 451 = 364
364 ÷ 451 = 0.8070953436807096
0.8070953436807096 x 100 = 80.71%