To find the total fractional amount of the desired funds raised from the bake sale and the yard sale, you can add the two fractions together:
- The amount raised from the bake sale is \( \frac{3}{8} \).
- The amount raised from the yard sale is \( \frac{1}{4} \).
To add these fractions, we need a common denominator. The denominators are 8 and 4. The least common multiple of 8 and 4 is 8.
Now, we can convert \( \frac{1}{4} \) to a fraction with a denominator of 8:
\[ \frac{1}{4} = \frac{1 \times 2}{4 \times 2} = \frac{2}{8} \]
Now we can add \( \frac{3}{8} \) and \( \frac{2}{8} \):
\[ \frac{3}{8} + \frac{2}{8} = \frac{3 + 2}{8} = \frac{5}{8} \]
Thus, the total fractional amount of the desired funds they have raised is \( \frac{5}{8} \).