945
Chat with our AI personalities
LCD(9, 21) = 63
The least common multiple (LCM) of 5 and 7 is 35, not the least common denominator (LCD). The LCD is used in adding or subtracting fractions and is the least common multiple of the denominators. In this case, since 5 and 7 are prime numbers and have no common factors, the LCD is simply the product of the two denominators, which is 5 * 7 = 35.
LCD(49, 21) = 147
There IS only one LCD. The word least is a superlative, which means there can be only one. LCD(79, 90) = 7110
LCD(13, 16) = 208