-89.69% is the change from 388 to 40
Calculation steps:
[( 40 - 388 ) ÷ 388] x 100 = -89.69%
Formula
Percentage change = [(40 - 388) / 388] x 100
Subtract the new number by the original number
40 - 388 = -348
-348 ÷ 388 = -0.8969072164948454
-0.8969072164948454 x 100 = -89.69%