-18.97% is the change from 390 to 316
Calculation steps:
[( 316 - 390 ) ÷ 390] x 100 = -18.97%
Formula
Percentage change = [(316 - 390) / 390] x 100
Subtract the new number by the original number
316 - 390 = -74
-74 ÷ 390 = -0.18974358974358974
-0.18974358974358974 x 100 = -18.97%