-96.92% is the change from 487 to 15
Calculation steps:
[( 15 - 487 ) ÷ 487] x 100 = -96.92%
Formula
Percentage change = [(15 - 487) / 487] x 100
Subtract the new number by the original number
15 - 487 = -472
-472 ÷ 487 = -0.9691991786447639
-0.9691991786447639 x 100 = -96.92%