-27.82% is the change from 399 to 288
Calculation steps:
[( 288 - 399 ) ÷ 399] x 100 = -27.82%
Formula
Percentage change = [(288 - 399) / 399] x 100
Subtract the new number by the original number
288 - 399 = -111
-111 ÷ 399 = -0.2781954887218045
-0.2781954887218045 x 100 = -27.82%