-97.52% is the change from 686 to 17
Calculation steps:
[( 17 - 686 ) ÷ 686] x 100 = -97.52%
Formula
Percentage change = [(17 - 686) / 686] x 100
Subtract the new number by the original number
17 - 686 = -669
-669 ÷ 686 = -0.9752186588921283
-0.9752186588921283 x 100 = -97.52%