-47.6% is the change from 479 to 251
Calculation steps:
[( 251 - 479 ) ÷ 479] x 100 = -47.6%
Formula
Percentage change = [(251 - 479) / 479] x 100
Subtract the new number by the original number
251 - 479 = -228
-228 ÷ 479 = -0.4759916492693111
-0.4759916492693111 x 100 = -47.6%