-88.74% is the change from 870 to 98
Calculation steps:
[( 98 - 870 ) ÷ 870] x 100 = -88.74%
Formula
Percentage change = [(98 - 870) / 870] x 100
Subtract the new number by the original number
98 - 870 = -772
-772 ÷ 870 = -0.8873563218390804
-0.8873563218390804 x 100 = -88.74%