-81.91% is the change from 879 to 159
Calculation steps:
[( 159 - 879 ) ÷ 879] x 100 = -81.91%
Formula
Percentage change = [(159 - 879) / 879] x 100
Subtract the new number by the original number
159 - 879 = -720
-720 ÷ 879 = -0.8191126279863481
-0.8191126279863481 x 100 = -81.91%