-86.19% is the change from 717 to 99
Calculation steps:
[( 99 - 717 ) ÷ 717] x 100 = -86.19%
Formula
Percentage change = [(99 - 717) / 717] x 100
Subtract the new number by the original number
99 - 717 = -618
-618 ÷ 717 = -0.8619246861924686
-0.8619246861924686 x 100 = -86.19%