-96.47% is the change from 879 to 31
Calculation steps:
[( 31 - 879 ) ÷ 879] x 100 = -96.47%
Formula
Percentage change = [(31 - 879) / 879] x 100
Subtract the new number by the original number
31 - 879 = -848
-848 ÷ 879 = -0.9647326507394767
-0.9647326507394767 x 100 = -96.47%