Answer: The LCD would be 1.
Explanation:
To find the least (or greatest) common denominator or factor of a number,
you are going to want to list out the factors of each. For this, it's asking for the denominator, so the numbers we are going to be using are 5 and 9.
The factors of 5 are only two numbers: 1 and 5.
The factors of 9 are the following numbers: 1, 3, and 9.
Thus, your least common denominator for these two fractions would be 1.