-47.7% is the change from 478 to 250
Calculation steps:
[( 250 - 478 ) ÷ 478] x 100 = -47.7%
Formula
Percentage change = [(250 - 478) / 478] x 100
Subtract the new number by the original number
250 - 478 = -228
-228 ÷ 478 = -0.4769874476987448
-0.4769874476987448 x 100 = -47.7%