68.6% is the change from 449 to 757
Calculation steps:
[( 757 - 449 ) ÷ 449] x 100 = 68.6%
Formula
Percentage change = [(757 - 449) / 449] x 100
Subtract the new number by the original number
757 - 449 = 308
308 ÷ 449 = 0.6859688195991092
0.6859688195991092 x 100 = 68.6%