-18.85% is the change from 870 to 706
Calculation steps:
[( 706 - 870 ) ÷ 870] x 100 = -18.85%
Formula
Percentage change = [(706 - 870) / 870] x 100
Subtract the new number by the original number
706 - 870 = -164
-164 ÷ 870 = -0.18850574712643678
-0.18850574712643678 x 100 = -18.85%