-98.54% is the change from 686 to 10
Calculation steps:
[( 10 - 686 ) ÷ 686] x 100 = -98.54%
Formula
Percentage change = [(10 - 686) / 686] x 100
Subtract the new number by the original number
10 - 686 = -676
-676 ÷ 686 = -0.9854227405247813
-0.9854227405247813 x 100 = -98.54%