Math Problem Solver

$$\frac{3}{20} + \frac{1}{4} = \frac{2}{5} = 0.4$$

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of $\frac{3}{20}$ and $\frac{1}{4}$ is $20$. $$\begin{aligned} \frac{3}{20} + \frac{1}{4} &= \frac{3 \cdot 1}{20 \cdot 1} + \frac{1 \cdot 5}{4 \cdot 5} \\ &= \frac{3 + 5}{20} \\ &= \frac{8}{20} \\&= \frac{2}{5} \end{aligned}$$