-8.32% is the change from 949 to 870
Calculation steps:
[( 870 - 949 ) ÷ 949] x 100 = -8.32%
Formula
Percentage change = [(870 - 949) / 949] x 100
Subtract the new number by the original number
870 - 949 = -79
-79 ÷ 949 = -0.08324552160168598
-0.08324552160168598 x 100 = -8.32%