-0.94% is the change from 847 to 839
Calculation steps:
[( 839 - 847 ) ÷ 847] x 100 = -0.94%
Formula
Percentage change = [(839 - 847) / 847] x 100
Subtract the new number by the original number
839 - 847 = -8
-8 ÷ 847 = -0.009445100354191263
-0.009445100354191263 x 100 = -0.94%