-26.01% is the change from 346 to 256
Calculation steps:
[( 256 - 346 ) ÷ 346] x 100 = -26.01%
Formula
Percentage change = [(256 - 346) / 346] x 100
Subtract the new number by the original number
256 - 346 = -90
-90 ÷ 346 = -0.26011560693641617
-0.26011560693641617 x 100 = -26.01%