-50.99% is the change from 455 to 223
Calculation steps:
[( 223 - 455 ) ÷ 455] x 100 = -50.99%
Formula
Percentage change = [(223 - 455) / 455] x 100
Subtract the new number by the original number
223 - 455 = -232
-232 ÷ 455 = -0.5098901098901099
-0.5098901098901099 x 100 = -50.99%