-88.78% is the change from 891 to 100
Calculation steps:
[( 100 - 891 ) ÷ 891] x 100 = -88.78%
Formula
Percentage change = [(100 - 891) / 891] x 100
Subtract the new number by the original number
100 - 891 = -791
-791 ÷ 891 = -0.8877665544332211
-0.8877665544332211 x 100 = -88.78%