Math Problem Solver

\[ 2.1 = \frac{21}{10} = 2.1 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{2}{1}\) and \(\frac{1}{10}\) is \(10\). \[ \begin{aligned} 2.1 &= \frac{2 \cdot 10}{1 \cdot 10} + \frac{1 \cdot 1}{10 \cdot 1} \\ &= \frac{20 + 1}{10} \\ &= \frac{21}{10} \end{aligned} \]