82.41% is the change from 449 to 819
Calculation steps:
[( 819 - 449 ) ÷ 449] x 100 = 82.41%
Formula
Percentage change = [(819 - 449) / 449] x 100
Subtract the new number by the original number
819 - 449 = 370
370 ÷ 449 = 0.8240534521158129
0.8240534521158129 x 100 = 82.41%