-43.21% is the change from 449 to 255
Calculation steps:
[( 255 - 449 ) ÷ 449] x 100 = -43.21%
Formula
Percentage change = [(255 - 449) / 449] x 100
Subtract the new number by the original number
255 - 449 = -194
-194 ÷ 449 = -0.43207126948775054
-0.43207126948775054 x 100 = -43.21%