-2.3% is the change from 869 to 849
Calculation steps:
[( 849 - 869 ) ÷ 869] x 100 = -2.3%
Formula
Percentage change = [(849 - 869) / 869] x 100
Subtract the new number by the original number
849 - 869 = -20
-20 ÷ 869 = -0.023014959723820484
-0.023014959723820484 x 100 = -2.3%