-98.16% is the change from 488 to 9
Calculation steps:
[( 9 - 488 ) ÷ 488] x 100 = -98.16%
Formula
Percentage change = [(9 - 488) / 488] x 100
Subtract the new number by the original number
9 - 488 = -479
-479 ÷ 488 = -0.9815573770491803
-0.9815573770491803 x 100 = -98.16%