Question 105747
From your explanation, your rectangle is split into 7 sections.
The total is 7. 
Your denominator is 7. 
If you counted all 7 sections, your fraction would be 7/7=1=100%, 
that is it would be the whole rectangle. 
You only want the red sections. How many out of 7 are colored red. 
Number of red sections is 3. 
Fraction of red sections to total sections is 3/7.