81.02% is the change from 453 to 820
Calculation steps:
[( 820 - 453 ) ÷ 453] x 100 = 81.02%
Formula
Percentage change = [(820 - 453) / 453] x 100
Subtract the new number by the original number
820 - 453 = 367
367 ÷ 453 = 0.8101545253863135
0.8101545253863135 x 100 = 81.02%