82.85% is the change from 449 to 821
Calculation steps:
[( 821 - 449 ) ÷ 449] x 100 = 82.85%
Formula
Percentage change = [(821 - 449) / 449] x 100
Subtract the new number by the original number
821 - 449 = 372
372 ÷ 449 = 0.8285077951002228
0.8285077951002228 x 100 = 82.85%