LCD(9, 21) = 63
The least common denominator (LCD) is 1.
LCD(49, 21) = 147
If you mean lcm, it is 36 because 9 x 4 equals 36 and 3 x 12 equals 36.
LCD(7, 5, 10) = 10
21
21.
It is 42
LCD(8, 21, 7) = 168.
21
It is: 294 which is the same as its LCM
LCD(9, 21) = 63
The least common denominator (LCD) is 1.
LCD(18, 21) = 126
The Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of a pair of fractions. I assume the 7 and 21 are the denominators of two fractions you need to add or subtract.LCD(7, 21) = 21.
Put as 6/7 - 4/21, change to LCD: 18/21 - 4/21, which is 14/21, or 2/3
I think what you might have meant was LCD (Lowest Common Denominator) The LCD for 11/7 and 3/8 is 56 Making equivalent fractions using the LCD: 11/7 becomes 88/56 3/8 becomes 21/56