81.74% is the change from 449 to 816
Calculation steps:
[( 816 - 449 ) ÷ 449] x 100 = 81.74%
Formula
Percentage change = [(816 - 449) / 449] x 100
Subtract the new number by the original number
816 - 449 = 367
367 ÷ 449 = 0.8173719376391982
0.8173719376391982 x 100 = 81.74%