Solve the Fraction Addition: 1/5 + 3/5 Step-by-Step

To solve this problem, we'll follow these steps:

• Step 1: Identify the common denominator.
• Step 2: Add the numerators and keep the common denominator.

Now, let's work through each step:
Step 1: Both fractions $\frac{1}{5}$ and $\frac{3}{5}$ have the common denominator of 5.
Step 2: Add the numerators: $1 + 3 = 4$.
Thus, we get $\frac{4}{5}$.

Therefore, the solution to the problem is $\frac{4}{5}$. This corresponds to choice 4.