Question

What is the least common denominator for the fractions1/6and 3/4 ?

Answer 1

A. 12; Least common denominator is the least multiple that the denominator have together. So you multiply the denominators until you get the first number they both have in common.
6*1 = 6
6*2 =12

4*1 =4
4*2 =8
4*3 = 12 

Since the first number they both have in common is 12, the least common denominator is 12