-47.2% is the change from 483 to 255
Calculation steps:
[( 255 - 483 ) ÷ 483] x 100 = -47.2%
Formula
Percentage change = [(255 - 483) / 483] x 100
Subtract the new number by the original number
255 - 483 = -228
-228 ÷ 483 = -0.4720496894409938
-0.4720496894409938 x 100 = -47.2%
Example