-6.91% is the change from 839 to 781
Calculation steps:
[( 781 - 839 ) ÷ 839] x 100 = -6.91%
Formula
Percentage change = [(781 - 839) / 839] x 100
Subtract the new number by the original number
781 - 839 = -58
-58 ÷ 839 = -0.06912991656734208
-0.06912991656734208 x 100 = -6.91%