Solve the Addition: 2/7 + 2/7 Step-by-Step

To solve the problem of adding $\frac{2}{7}$ and $\frac{2}{7}$, we proceed with the following steps:

Step 1: Identify the common denominator, which is 7 in this case. Since both fractions have the same denominator, we can apply the formula directly for adding fractions with a common denominator:

$\frac{a}{c} + \frac{b}{c} = \frac{a+b}{c}$

Step 2: Add the numerators of the fractions. Combining the numerators, we have:

$2 + 2 = 4$

Step 3: Write the resulting fraction using the sum of the numerators and the common denominator. The resulting fraction becomes:

$\frac{4}{7}$

Conclusion: By adding the numerators and using the shared denominator, the sum of $\frac{2}{7} + \frac{2}{7}$ is $\frac{4}{7}$.

The correct answer choice is $\frac{4}{7}$, and this corresponds to choice 4.

Thus, the solution to the problem is $\frac{4}{7}$.