-50% is the change from 176 to 88
Calculation steps:
[( 88 - 176 ) ÷ 176] x 100 = -50%
Formula
Percentage change = [(88 - 176) / 176] x 100
Subtract the new number by the original number
88 - 176 = -88
-88 ÷ 176 = -0.5
-0.5 x 100 = -50%
Example