-98.4% is the change from 686 to 11
Calculation steps:
[( 11 - 686 ) ÷ 686] x 100 = -98.4%
Formula
Percentage change = [(11 - 686) / 686] x 100
Subtract the new number by the original number
11 - 686 = -675
-675 ÷ 686 = -0.9839650145772595
-0.9839650145772595 x 100 = -98.4%