-51.54% is the change from 456 to 221
Calculation steps:
[( 221 - 456 ) ÷ 456] x 100 = -51.54%
Formula
Percentage change = [(221 - 456) / 456] x 100
Subtract the new number by the original number
221 - 456 = -235
-235 ÷ 456 = -0.5153508771929824
-0.5153508771929824 x 100 = -51.54%