-19.59% is the change from 393 to 316
Calculation steps:
[( 316 - 393 ) ÷ 393] x 100 = -19.59%
Formula
Percentage change = [(316 - 393) / 393] x 100
Subtract the new number by the original number
316 - 393 = -77
-77 ÷ 393 = -0.19592875318066158
-0.19592875318066158 x 100 = -19.59%