-42.98% is the change from 449 to 256
Calculation steps:
[( 256 - 449 ) ÷ 449] x 100 = -42.98%
Formula
Percentage change = [(256 - 449) / 449] x 100
Subtract the new number by the original number
256 - 449 = -193
-193 ÷ 449 = -0.4298440979955457
-0.4298440979955457 x 100 = -42.98%