-96.91% is the change from 486 to 15
Calculation steps:
[( 15 - 486 ) ÷ 486] x 100 = -96.91%
Formula
Percentage change = [(15 - 486) / 486] x 100
Subtract the new number by the original number
15 - 486 = -471
-471 ÷ 486 = -0.9691358024691358
-0.9691358024691358 x 100 = -96.91%