-88.88% is the change from 899 to 100
Calculation steps:
[( 100 - 899 ) ÷ 899] x 100 = -88.88%
Formula
Percentage change = [(100 - 899) / 899] x 100
Subtract the new number by the original number
100 - 899 = -799
-799 ÷ 899 = -0.8887652947719689
-0.8887652947719689 x 100 = -88.88%