Answer:[tex] \frac{1}{7} + \frac{3}{7 } = \frac{4}{7} [/tex]Step-by-step explanation:Since they have similar denominator, this is called similar fraction. If we are adding or subtracting the similar fraction, we will just copy the denominator and perform the operation in the numerator.[tex] \frac{1}{7} + \frac{3}{7} = \frac{1 + 3}{7} = \frac{4}{7} [/tex]