-98.14% is the change from 805 to 15
Calculation steps:
[( 15 - 805 ) ÷ 805] x 100 = -98.14%
Formula
Percentage change = [(15 - 805) / 805] x 100
Subtract the new number by the original number
15 - 805 = -790
-790 ÷ 805 = -0.9813664596273292
-0.9813664596273292 x 100 = -98.14%