-2.19% is the change from 869 to 850
Calculation steps:
[( 850 - 869 ) ÷ 869] x 100 = -2.19%
Formula
Percentage change = [(850 - 869) / 869] x 100
Subtract the new number by the original number
850 - 869 = -19
-19 ÷ 869 = -0.02186421173762946
-0.02186421173762946 x 100 = -2.19%