-86.42% is the change from 729 to 99
Calculation steps:
[( 99 - 729 ) ÷ 729] x 100 = -86.42%
Formula
Percentage change = [(99 - 729) / 729] x 100
Subtract the new number by the original number
99 - 729 = -630
-630 ÷ 729 = -0.8641975308641975
-0.8641975308641975 x 100 = -86.42%