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Rename [tex]\frac{3}{5}[/tex] and [tex]\frac{6}{7}[/tex] using the least common denominator.

A. [tex]\frac{21}{35}[/tex] and [tex]\frac{30}{35}[/tex]

B. [tex]\frac{18}{30}[/tex] and [tex]\frac{24}{30}[/tex]

C. [tex]\frac{42}{70}[/tex] and [tex]\frac{60}{70}[/tex]

Answer :

To rename the fractions [tex]\(\frac{3}{5}\)[/tex] and [tex]\(\frac{6}{7}\)[/tex] with a common denominator, we need to find the least common denominator (LCD) and convert both fractions accordingly.

### Step 1: Find the Least Common Denominator (LCD)
- The denominators here are 5 and 7.
- The least common multiple of 5 and 7 is 35.

### Step 2: Convert [tex]\(\frac{3}{5}\)[/tex] to a fraction with a denominator of 35
- To change the denominator from 5 to 35, determine how many times 5 fits into 35. This is [tex]\(35 ÷ 5 = 7\)[/tex].
- Multiply both the numerator and the denominator of [tex]\(\frac{3}{5}\)[/tex] by 7:
[tex]\[
\frac{3 \times 7}{5 \times 7} = \frac{21}{35}
\][/tex]

### Step 3: Convert [tex]\(\frac{6}{7}\)[/tex] to a fraction with a denominator of 35
- To change the denominator from 7 to 35, determine how many times 7 fits into 35. This is [tex]\(35 ÷ 7 = 5\)[/tex].
- Multiply both the numerator and the denominator of [tex]\(\frac{6}{7}\)[/tex] by 5:
[tex]\[
\frac{6 \times 5}{7 \times 5} = \frac{30}{35}
\][/tex]

### Conclusion:
The fractions [tex]\(\frac{3}{5}\)[/tex] and [tex]\(\frac{6}{7}\)[/tex] renamed with the least common denominator of 35 are [tex]\(\frac{21}{35}\)[/tex] and [tex]\(\frac{30}{35}\)[/tex].

Thus, the correct answer is A. [tex]\(\frac{21}{35}\)[/tex] and [tex]\(\frac{30}{35}\)[/tex]

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