-69.83% is the change from 686 to 207
Calculation steps:
[( 207 - 686 ) ÷ 686] x 100 = -69.83%
Formula
Percentage change = [(207 - 686) / 686] x 100
Subtract the new number by the original number
207 - 686 = -479
-479 ÷ 686 = -0.6982507288629738
-0.6982507288629738 x 100 = -69.83%