-38.08% is the change from 449 to 278
Calculation steps:
[( 278 - 449 ) ÷ 449] x 100 = -38.08%
Formula
Percentage change = [(278 - 449) / 449] x 100
Subtract the new number by the original number
278 - 449 = -171
-171 ÷ 449 = -0.38084632516703787
-0.38084632516703787 x 100 = -38.08%