79.82% is the change from 456 to 820
Calculation steps:
[( 820 - 456 ) ÷ 456] x 100 = 79.82%
Formula
Percentage change = [(820 - 456) / 456] x 100
Subtract the new number by the original number
820 - 456 = 364
364 ÷ 456 = 0.7982456140350878
0.7982456140350878 x 100 = 79.82%