-8.97% is the change from 390 to 355
Calculation steps:
[( 355 - 390 ) ÷ 390] x 100 = -8.97%
Formula
Percentage change = [(355 - 390) / 390] x 100
Subtract the new number by the original number
355 - 390 = -35
-35 ÷ 390 = -0.08974358974358974
-0.08974358974358974 x 100 = -8.97%