-51.1% is the change from 456 to 223
Calculation steps:
[( 223 - 456 ) ÷ 456] x 100 = -51.1%
Formula
Percentage change = [(223 - 456) / 456] x 100
Subtract the new number by the original number
223 - 456 = -233
-233 ÷ 456 = -0.5109649122807017
-0.5109649122807017 x 100 = -51.1%