81.96% is the change from 449 to 817
Calculation steps:
[( 817 - 449 ) ÷ 449] x 100 = 81.96%
Formula
Percentage change = [(817 - 449) / 449] x 100
Subtract the new number by the original number
817 - 449 = 368
368 ÷ 449 = 0.8195991091314031
0.8195991091314031 x 100 = 81.96%