-18.03% is the change from 488 to 400
Calculation steps:
[( 400 - 488 ) ÷ 488] x 100 = -18.03%
Formula
Percentage change = [(400 - 488) / 488] x 100
Subtract the new number by the original number
400 - 488 = -88
-88 ÷ 488 = -0.18032786885245902
-0.18032786885245902 x 100 = -18.03%