-17.78% is the change from 388 to 319
Calculation steps:
[( 319 - 388 ) ÷ 388] x 100 = -17.78%
Formula
Percentage change = [(319 - 388) / 388] x 100
Subtract the new number by the original number
319 - 388 = -69
-69 ÷ 388 = -0.17783505154639176
-0.17783505154639176 x 100 = -17.78%