3/8:1/4

To divide the fractions \( \frac{3}{8} \) by \( \frac{1}{4} \), you can multiply by the reciprocal of the second fraction:

\[ \frac{3}{8} \div \frac{1}{4} = \frac{3}{8} \times \frac{4}{1} \]

Now, multiply the numerators and the denominators:

\[ = \frac{3 \times 4}{8 \times 1} = \frac{12}{8} \]

Next, simplify \( \frac{12}{8} \):

\[ \frac{12}{8} = \frac{3}{2} \]

So, \( \frac{3}{8} : \frac{1}{4} = \frac{3}{2} \) or \( 1.5 \).