LCD is the Lowest Common Denominator which is the lowest number into which the denominators of all the fractions will each divide exactly.
Each of the fractions can then be converted to an equivalent fraction with the new denominator which then allows the fractions to be added and/or subtracted.
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The LCD of two fractions is the same as the LCM of their denominators.
1/3 and 3/8 have a lcd of 24 (8/24 and 9/24)
1/6 is one fraction. You need at least two fractions to find something in common.
Two or more fractions are needed in order to find the LCD
The least common multiple of two or more denominators is known as the least common denominator, or LCD.