-0.24% is the change from 849 to 847
Calculation steps:
[( 847 - 849 ) ÷ 849] x 100 = -0.24%
Formula
Percentage change = [(847 - 849) / 849] x 100
Subtract the new number by the original number
847 - 849 = -2
-2 ÷ 849 = -0.002355712603062426
-0.002355712603062426 x 100 = -0.24%