-4.05% is the change from 839 to 805
Calculation steps:
[( 805 - 839 ) ÷ 839] x 100 = -4.05%
Formula
Percentage change = [(805 - 839) / 839] x 100
Subtract the new number by the original number
805 - 839 = -34
-34 ÷ 839 = -0.04052443384982122
-0.04052443384982122 x 100 = -4.05%