-28.99% is the change from 966 to 686
Calculation steps:
[( 686 - 966 ) ÷ 966] x 100 = -28.99%
Formula
Percentage change = [(686 - 966) / 966] x 100
Subtract the new number by the original number
686 - 966 = -280
-280 ÷ 966 = -0.2898550724637681
-0.2898550724637681 x 100 = -28.99%