-26.34% is the change from 391 to 288
Calculation steps:
[( 288 - 391 ) ÷ 391] x 100 = -26.34%
Formula
Percentage change = [(288 - 391) / 391] x 100
Subtract the new number by the original number
288 - 391 = -103
-103 ÷ 391 = -0.26342710997442453
-0.26342710997442453 x 100 = -26.34%