-0.36% is the change from 842 to 839
Calculation steps:
[( 839 - 842 ) ÷ 842] x 100 = -0.36%
Formula
Percentage change = [(839 - 842) / 842] x 100
Subtract the new number by the original number
839 - 842 = -3
-3 ÷ 842 = -0.0035629453681710215
-0.0035629453681710215 x 100 = -0.36%