-20.08% is the change from 488 to 390
Calculation steps:
[( 390 - 488 ) ÷ 488] x 100 = -20.08%
Formula
Percentage change = [(390 - 488) / 488] x 100
Subtract the new number by the original number
390 - 488 = -98
-98 ÷ 488 = -0.20081967213114754
-0.20081967213114754 x 100 = -20.08%