-47.54% is the change from 488 to 256
Calculation steps:
[( 256 - 488 ) ÷ 488] x 100 = -47.54%
Formula
Percentage change = [(256 - 488) / 488] x 100
Subtract the new number by the original number
256 - 488 = -232
-232 ÷ 488 = -0.47540983606557374
-0.47540983606557374 x 100 = -47.54%