Answer:
3.2 of 8 pieces.
Explanation:
If a figure is cut into 8 equal pieces, and we need to shade 
 of that figure, we can use these equations:
 of that figure, we can use these equations:
So, the fraction that needs to be shaded is 
 .
.
The fraction simplified to have a denominator of 8 is: 

Therefore, the fraction that needs to be shaded is 3.2 of 8 pieces.