-88.28% is the change from 870 to 102
Calculation steps:
[( 102 - 870 ) ÷ 870] x 100 = -88.28%
Formula
Percentage change = [(102 - 870) / 870] x 100
Subtract the new number by the original number
102 - 870 = -768
-768 ÷ 870 = -0.8827586206896552
-0.8827586206896552 x 100 = -88.28%