-17.64% is the change from 839 to 691
Calculation steps:
[( 691 - 839 ) ÷ 839] x 100 = -17.64%
Formula
Percentage change = [(691 - 839) / 839] x 100
Subtract the new number by the original number
691 - 839 = -148
-148 ÷ 839 = -0.1764004767580453
-0.1764004767580453 x 100 = -17.64%