51.45% is the change from 449 to 680
Calculation steps:
[( 680 - 449 ) ÷ 449] x 100 = 51.45%
Formula
Percentage change = [(680 - 449) / 449] x 100
Subtract the new number by the original number
680 - 449 = 231
231 ÷ 449 = 0.5144766146993318
0.5144766146993318 x 100 = 51.45%