-47.33% is the change from 486 to 256
Calculation steps:
[( 256 - 486 ) ÷ 486] x 100 = -47.33%
Formula
Percentage change = [(256 - 486) / 486] x 100
Subtract the new number by the original number
256 - 486 = -230
-230 ÷ 486 = -0.4732510288065844
-0.4732510288065844 x 100 = -47.33%