-96.99% is the change from 498 to 15
Calculation steps:
[( 15 - 498 ) ÷ 498] x 100 = -96.99%
Formula
Percentage change = [(15 - 498) / 498] x 100
Subtract the new number by the original number
15 - 498 = -483
-483 ÷ 498 = -0.9698795180722891
-0.9698795180722891 x 100 = -96.99%