-82.99% is the change from 870 to 148
Calculation steps:
[( 148 - 870 ) ÷ 870] x 100 = -82.99%
Formula
Percentage change = [(148 - 870) / 870] x 100
Subtract the new number by the original number
148 - 870 = -722
-722 ÷ 870 = -0.8298850574712644
-0.8298850574712644 x 100 = -82.99%