80.93% is the change from 451 to 816
Calculation steps:
[( 816 - 451 ) ÷ 451] x 100 = 80.93%
Formula
Percentage change = [(816 - 451) / 451] x 100
Subtract the new number by the original number
816 - 451 = 365
365 ÷ 451 = 0.8093126385809313
0.8093126385809313 x 100 = 80.93%