Answer: B / To multiply two fractions, you need to multiply both fractions’ denominator and numerator, so:
[tex]
\frac{3}{8} \cdot \frac{4}{7} = \\ \\ \\
\frac{3 \cdot 4}{8 \cdot 7} = \\ \\ \\
\frac{12}{56}
[/tex]
Now, we can simplify those fractions, by divining both numerator and denomimator by 4:
[tex]
\frac{12 : 4}{56 : 4} = \frac{3}{14}[/tex]
So the right answer is B) 3/14. Hope this helps!