-0.12% is the change from 849 to 848
Calculation steps:
[( 848 - 849 ) ÷ 849] x 100 = -0.12%
Formula
Percentage change = [(848 - 849) / 849] x 100
Subtract the new number by the original number
848 - 849 = -1
-1 ÷ 849 = -0.001177856301531213
-0.001177856301531213 x 100 = -0.12%