-81.88% is the change from 480 to 87
Calculation steps:
[( 87 - 480 ) ÷ 480] x 100 = -81.88%
Formula
Percentage change = [(87 - 480) / 480] x 100
Subtract the new number by the original number
87 - 480 = -393
-393 ÷ 480 = -0.81875
-0.81875 x 100 = -81.88%