-69.68% is the change from 686 to 208
Calculation steps:
[( 208 - 686 ) ÷ 686] x 100 = -69.68%
Formula
Percentage change = [(208 - 686) / 686] x 100
Subtract the new number by the original number
208 - 686 = -478
-478 ÷ 686 = -0.6967930029154519
-0.6967930029154519 x 100 = -69.68%