The problem presented in the image describes a situation where someone wants to purchase fractions of a cupcake:

• A third for themselves.
• A third for their sister.
• Seven thirds for their cousin.

Let's add these fractions:

$\frac{1}{3} + \frac{1}{3} + \frac{7}{3} = \frac{1+1+7}{3} = \frac{9}{3} = 3$

So, the total number of cupcakes needed is 3 cupcakes.

Would you like further details or have any questions?

Here are 5 related questions:

1. How can we divide cupcakes evenly among more people using fractions?
2. What happens if we change the fraction to a half instead of a third?
3. How would you calculate the total if one person wanted more than a full cupcake?
4. Can you simplify fractions when they have different denominators?
5. How would you add fractions with unlike denominators?

Tip: When adding fractions, ensure the denominators are the same before summing the numerators.