Express the fractions 1/2, 3/26, and 7/8 with an lcd?

Factors for 2 is just 2, since it's a prime.

factors for 26 are 2 and 13.

factors for 8 are 2, 2 and 2.

since the 2 is repeated on all 3, we'll use it in the LCD only once.

therefore, the LCD will be 2 * 13 * 2 * 2, or 104.

now, what we do is, divide each denominator by the LCD, and whatever quotient we get, we multiply it top and bottom by it, so let's do so,

The answer would be a