-98.63% is the change from 879 to 12
Calculation steps:
[( 12 - 879 ) ÷ 879] x 100 = -98.63%
Formula
Percentage change = [(12 - 879) / 879] x 100
Subtract the new number by the original number
12 - 879 = -867
-867 ÷ 879 = -0.9863481228668942
-0.9863481228668942 x 100 = -98.63%