To evaluate \( \frac{5}{2} \div \frac{7}{4} \), we can multiply by the reciprocal of the second fraction:
\[ \frac{5}{2} \div \frac{7}{4} = \frac{5}{2} \times \frac{4}{7} \]
Now, we can multiply the fractions:
\[ \frac{5 \times 4}{2 \times 7} = \frac{20}{14} \]
Next, we can simplify \( \frac{20}{14} \) by finding the greatest common divisor (GCD) of 20 and 14, which is 2:
\[ \frac{20 \div 2}{14 \div 2} = \frac{10}{7} \]
Thus, the simplified answer is \( \frac{10}{7} \) or "10 sevenths".
So the final answer is:
\[ \boxed{\frac{10}{7}} \text{ or } 10 \text{ sevenths} \]