-29.93% is the change from 979 to 686
Calculation steps:
[( 686 - 979 ) ÷ 979] x 100 = -29.93%
Formula
Percentage change = [(686 - 979) / 979] x 100
Subtract the new number by the original number
686 - 979 = -293
-293 ÷ 979 = -0.2992849846782431
-0.2992849846782431 x 100 = -29.93%