-23.58% is the change from 335 to 256
Calculation steps:
[( 256 - 335 ) ÷ 335] x 100 = -23.58%
Formula
Percentage change = [(256 - 335) / 335] x 100
Subtract the new number by the original number
256 - 335 = -79
-79 ÷ 335 = -0.23582089552238805
-0.23582089552238805 x 100 = -23.58%