The LCD of two fractions is the same as the LCM of their denominators.
When multiplying fractions, it is not necessary to find the LCD first.
It is easy: just convert to decimal fractions.
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.
The LCD, or Lowest Common Denominator, is the smallest multiple of each of the denominators of a set of fractions. So, assuming that 2, 4 and 5 are denominators of fractions (1/2, 1/4 and 1/5, for example), the LCD would be 20, because 20 is the lowest number that 2, 4 and 5 multiply into. So, your new fractions would be 10/20, 5/20 and 4/20. The purpose of finding the LCD is to allow for multiplying fractions together, or simply comparing them easily.
2/3,3/8Find the LCD. The LCD of 3 and 8 is 24. Multiply the fractions by whatever it takes to make 24.2/3 x 8/8 = 16/243/8 x 3/3 = 9/24
The LCD for fractions is the LCM (least common multiple) of all of the denominators.
When reducing fractions to their lowest terms or finding the LCD of fractions
The LCD of two fractions is the same as the LCM of their denominators.
LCD
Once you find the LCD, convert the fractions to their equivalents and then you can add and/or subtract them correctly.
You don't normally calculate the lcd of a single number (fraction). You would normally take the lcd of two or more fractions. In that case, ONLY the denominators are relevant to find the lcd.
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You need at least two fractions to find an LCD.
When multiplying fractions, it is not necessary to find the LCD first.