-87.5% is the change from 88 to 11
Calculation steps:
[( 11 - 88 ) ÷ 88] x 100 = -87.5%
Formula
Percentage change = [(11 - 88) / 88] x 100
Subtract the new number by the original number
11 - 88 = -77
-77 ÷ 88 = -0.875
-0.875 x 100 = -87.5%
Example