-2.81% is the change from 391 to 380
Calculation steps:
[( 380 - 391 ) ÷ 391] x 100 = -2.81%
Formula
Percentage change = [(380 - 391) / 391] x 100
Subtract the new number by the original number
380 - 391 = -11
-11 ÷ 391 = -0.028132992327365727
-0.028132992327365727 x 100 = -2.81%