Tính: \(\frac{{15}}{{20}} + \frac{7}{4}\)

* Hướng dẫn giải

\(\begin{array}{l}\frac{{15}}{{20}} + \frac{7}{4} = \frac{{15}}{{20}} + \frac{{35}}{{20}}\\ = \frac{{15 + 35}}{{20}} = \frac{{50}}{{20}} = \frac{5}{2}\end{array}\)