79.56% is the change from 455 to 817
Calculation steps:
[( 817 - 455 ) ÷ 455] x 100 = 79.56%
Formula
Percentage change = [(817 - 455) / 455] x 100
Subtract the new number by the original number
817 - 455 = 362
362 ÷ 455 = 0.7956043956043956
0.7956043956043956 x 100 = 79.56%