-89% is the change from 800 to 88
Calculation steps:
[( 88 - 800 ) ÷ 800] x 100 = -89%
Formula
Percentage change = [(88 - 800) / 800] x 100
Subtract the new number by the original number
88 - 800 = -712
-712 ÷ 800 = -0.89
-0.89 x 100 = -89%
Example