-87.52% is the change from 729 to 91
Calculation steps:
[( 91 - 729 ) ÷ 729] x 100 = -87.52%
Formula
Percentage change = [(91 - 729) / 729] x 100
Subtract the new number by the original number
91 - 729 = -638
-638 ÷ 729 = -0.8751714677640604
-0.8751714677640604 x 100 = -87.52%
Example