Once you find the LCD, convert the fractions to their equivalents and then you can add and/or subtract them correctly.
LCD
The LCD of two fractions is the same as the LCM of their denominators.
LCD
LCD
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 least common denominator, or LCD
You need at least two fractions to find an LCD.
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.
There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of two or more fractions. Even if you converted your numbers (x) to their fraction equivalents (x/1), the LCD will always be 1.
1/3 and 3/8 have a lcd of 24 (8/24 and 9/24)
You need at least two fractions to find a common denominator.
The function of the numbers in question. The process is the same. When comparing two whole numbers, we call it the LCM. When comparing two fractions, we call it the LCD.