-21.61% is the change from 870 to 682
Calculation steps:
[( 682 - 870 ) ÷ 870] x 100 = -21.61%
Formula
Percentage change = [(682 - 870) / 870] x 100
Subtract the new number by the original number
682 - 870 = -188
-188 ÷ 870 = -0.2160919540229885
-0.2160919540229885 x 100 = -21.61%