-26.6% is the change from 391 to 287
Calculation steps:
[( 287 - 391 ) ÷ 391] x 100 = -26.6%
Formula
Percentage change = [(287 - 391) / 391] x 100
Subtract the new number by the original number
287 - 391 = -104
-104 ÷ 391 = -0.2659846547314578
-0.2659846547314578 x 100 = -26.6%