Math Problem Solver

\[ 2.5 + \frac{5}{5} + 15 = \frac{37}{2} = 18.5 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{2}{1}\), \(\frac{5}{10}\), \(\frac{5}{5}\), and \(\frac{15}{1}\) is \(10\). \[ \begin{aligned} 2.5 + \frac{5}{5} + 15 &= \frac{2 \cdot 10}{1 \cdot 10} + \frac{5 \cdot 1}{10 \cdot 1} + \frac{5 \cdot 2}{5 \cdot 2} + \frac{15 \cdot 10}{1 \cdot 10} \\ &= \frac{20 + 5 + 10 + 150}{10} \\ &= \frac{185}{10} \\&= \frac{37}{2} \end{aligned} \]