-98.27% is the change from 867 to 15
Calculation steps:
[( 15 - 867 ) ÷ 867] x 100 = -98.27%
Formula
Percentage change = [(15 - 867) / 867] x 100
Subtract the new number by the original number
15 - 867 = -852
-852 ÷ 867 = -0.9826989619377162
-0.9826989619377162 x 100 = -98.27%