How do you get fractions to have the same denominator?

To get fractions to have the same denominator, first identify the least common multiple (LCM) of the denominators. Then, convert each fraction by multiplying both its numerator and denominator by the necessary factor to reach the LCM. This will create equivalent fractions that share the same denominator, allowing for easy addition or subtraction. For example, to add 1/4 and 1/6, you would convert them to 3/12 and 2/12, respectively, giving them a common denominator of 12.