-88.85% is the change from 888 to 99
Calculation steps:
[( 99 - 888 ) ÷ 888] x 100 = -88.85%
Formula
Percentage change = [(99 - 888) / 888] x 100
Subtract the new number by the original number
99 - 888 = -789
-789 ÷ 888 = -0.8885135135135135
-0.8885135135135135 x 100 = -88.85%