-98.29% is the change from 877 to 15
Calculation steps:
[( 15 - 877 ) ÷ 877] x 100 = -98.29%
Formula
Percentage change = [(15 - 877) / 877] x 100
Subtract the new number by the original number
15 - 877 = -862
-862 ÷ 877 = -0.9828962371721779
-0.9828962371721779 x 100 = -98.29%