82.63% is the change from 449 to 820
Calculation steps:
[( 820 - 449 ) ÷ 449] x 100 = 82.63%
Formula
Percentage change = [(820 - 449) / 449] x 100
Subtract the new number by the original number
820 - 449 = 371
371 ÷ 449 = 0.8262806236080178
0.8262806236080178 x 100 = 82.63%