-11.58% is the change from 950 to 840
Calculation steps:
[( 840 - 950 ) ÷ 950] x 100 = -11.58%
Formula
Percentage change = [(840 - 950) / 950] x 100
Subtract the new number by the original number
840 - 950 = -110
-110 ÷ 950 = -0.11578947368421053
-0.11578947368421053 x 100 = -11.58%