-12.87% is the change from 839 to 731
Calculation steps:
[( 731 - 839 ) ÷ 839] x 100 = -12.87%
Formula
Percentage change = [(731 - 839) / 839] x 100
Subtract the new number by the original number
731 - 839 = -108
-108 ÷ 839 = -0.12872467222884387
-0.12872467222884387 x 100 = -12.87%