-17.88% is the change from 839 to 689
Calculation steps:
[( 689 - 839 ) ÷ 839] x 100 = -17.88%
Formula
Percentage change = [(689 - 839) / 839] x 100
Subtract the new number by the original number
689 - 839 = -150
-150 ÷ 839 = -0.17878426698450536
-0.17878426698450536 x 100 = -17.88%