-31.4% is the change from 1000 to 686
Calculation steps:
[( 686 - 1000 ) ÷ 1000] x 100 = -31.4%
Formula
Percentage change = [(686 - 1000) / 1000] x 100
Subtract the new number by the original number
686 - 1000 = -314
-314 ÷ 1000 = -0.314
-0.314 x 100 = -31.4%