-39.74% is the change from 390 to 235
Calculation steps:
[( 235 - 390 ) ÷ 390] x 100 = -39.74%
Formula
Percentage change = [(235 - 390) / 390] x 100
Subtract the new number by the original number
235 - 390 = -155
-155 ÷ 390 = -0.3974358974358974
-0.3974358974358974 x 100 = -39.74%