Let's check the calculation step by step:

1. Find a common denominator for $\frac{3}{5}$ and $\frac{1}{4}$.

   • The least common denominator (LCD) of 5 and 4 is 20.

2. Convert the fractions:

   • $\frac{3}{5} = \frac{3 \times 4}{5 \times 4} = \frac{12}{20}$
   • $\frac{1}{4} = \frac{1 \times 5}{4 \times 5} = \frac{5}{20}$

3. Add the fractions:
   $\frac{12}{20} + \frac{5}{20} = \frac{12+5}{20} = \frac{17}{20}$

So, $\frac{3}{5} + \frac{1}{4} = \frac{17}{20}$, not $\frac{12}{20}$. Your calculation was incorrect.

Would you like a more detailed explanation?

Related Questions:

1. How do you find the least common denominator (LCD)?
2. How do you subtract fractions with different denominators?
3. What are improper fractions, and how do you convert them to mixed numbers?
4. How do you simplify fractions after addition?
5. Can you explain fraction multiplication and division?

Tip: Always check your work by converting back to decimals to verify accuracy! $\frac{3}{5} = 0.6$ and $\frac{1}{4} = 0.25$, so $0.6 + 0.25 = 0.85$, which matches $\frac{17}{20}$.