-98.6% is the change from 715 to 10
Calculation steps:
[( 10 - 715 ) ÷ 715] x 100 = -98.6%
Formula
Percentage change = [(10 - 715) / 715] x 100
Subtract the new number by the original number
10 - 715 = -705
-705 ÷ 715 = -0.986013986013986
-0.986013986013986 x 100 = -98.6%