-96.98% is the change from 497 to 15
Calculation steps:
[( 15 - 497 ) ÷ 497] x 100 = -96.98%
Formula
Percentage change = [(15 - 497) / 497] x 100
Subtract the new number by the original number
15 - 497 = -482
-482 ÷ 497 = -0.9698189134808853
-0.9698189134808853 x 100 = -96.98%