-87.64% is the change from 801 to 99
Calculation steps:
[( 99 - 801 ) ÷ 801] x 100 = -87.64%
Formula
Percentage change = [(99 - 801) / 801] x 100
Subtract the new number by the original number
99 - 801 = -702
-702 ÷ 801 = -0.8764044943820225
-0.8764044943820225 x 100 = -87.64%