-50% is the change from 446 to 223
Calculation steps:
[( 223 - 446 ) ÷ 446] x 100 = -50%
Formula
Percentage change = [(223 - 446) / 446] x 100
Subtract the new number by the original number
223 - 446 = -223
-223 ÷ 446 = -0.5
-0.5 x 100 = -50%
Example