-7.58% is the change from 950 to 878
Calculation steps:
[( 878 - 950 ) ÷ 950] x 100 = -7.58%
Formula
Percentage change = [(878 - 950) / 950] x 100
Subtract the new number by the original number
878 - 950 = -72
-72 ÷ 950 = -0.07578947368421053
-0.07578947368421053 x 100 = -7.58%