-50.78% is the change from 449 to 221
Calculation steps:
[( 221 - 449 ) ÷ 449] x 100 = -50.78%
Formula
Percentage change = [(221 - 449) / 449] x 100
Subtract the new number by the original number
221 - 449 = -228
-228 ÷ 449 = -0.5077951002227171
-0.5077951002227171 x 100 = -50.78%