The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The least multiple of a number is itself.
The least common denominator (LCD) is 630.
The numbers 7, 3, and 2 share no common denominator. They are prime numbers.
The least common denominator of 2, 5 and 7 is 70. Since all those numbers are prime, the answer is their product.
154
42
70
70
Least common denominator of 7 and 5 is 35.
There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of two or more fractions.
The Least Common Denominator of 5, 7, and 35 is 1.
7
It is: 84