-27.84% is the change from 388 to 280
Calculation steps:
[( 280 - 388 ) ÷ 388] x 100 = -27.84%
Formula
Percentage change = [(280 - 388) / 388] x 100
Subtract the new number by the original number
280 - 388 = -108
-108 ÷ 388 = -0.27835051546391754
-0.27835051546391754 x 100 = -27.84%