Question
Which is the common denominator of 1/4 and 3/5
9
15
16
20
9
15
16
20
Answers
GPT-4o mini
To find the common denominator of \( \frac{1}{4} \) and \( \frac{3}{5} \), we need to determine the least common multiple (LCM) of the denominators, which are 4 and 5.
The multiples of 4 are: 4, 8, 12, 16, 20, 24, ...
The multiples of 5 are: 5, 10, 15, 20, 25, ...
The smallest common multiple of 4 and 5 is 20.
Therefore, the common denominator of \( \frac{1}{4} \) and \( \frac{3}{5} \) is **20**.
The multiples of 4 are: 4, 8, 12, 16, 20, 24, ...
The multiples of 5 are: 5, 10, 15, 20, 25, ...
The smallest common multiple of 4 and 5 is 20.
Therefore, the common denominator of \( \frac{1}{4} \) and \( \frac{3}{5} \) is **20**.