-96.88% is the change from 480 to 15
Calculation steps:
[( 15 - 480 ) ÷ 480] x 100 = -96.88%
Formula
Percentage change = [(15 - 480) / 480] x 100
Subtract the new number by the original number
15 - 480 = -465
-465 ÷ 480 = -0.96875
-0.96875 x 100 = -96.88%