To find the total fractional amount of the desired funds raised from both the bake sale and the yard sale, we need to add the two fractions together:
- The amount raised from the bake sale is \( \frac{3}{8} \).
- The amount raised from the yard sale is \( \frac{1}{4} \).
First, we need to express \( \frac{1}{4} \) with a common denominator of 8, since it will make it easier to add the fractions:
\[ \frac{1}{4} = \frac{2}{8} \]
Now we can add the two fractions together:
\[ \frac{3}{8} + \frac{2}{8} = \frac{3 + 2}{8} = \frac{5}{8} \]
So, the total fractional amount of the desired funds they have raised is \( \frac{5}{8} \).
Thus, the answer is:
5/8.