-98.54% is the change from 685 to 10
Calculation steps:
[( 10 - 685 ) ÷ 685] x 100 = -98.54%
Formula
Percentage change = [(10 - 685) / 685] x 100
Subtract the new number by the original number
10 - 685 = -675
-675 ÷ 685 = -0.9854014598540146
-0.9854014598540146 x 100 = -98.54%