-4.77% is the change from 839 to 799
Calculation steps:
[( 799 - 839 ) ÷ 839] x 100 = -4.77%
Formula
Percentage change = [(799 - 839) / 839] x 100
Subtract the new number by the original number
799 - 839 = -40
-40 ÷ 839 = -0.04767580452920143
-0.04767580452920143 x 100 = -4.77%