The least common multiple of 3 and 8 is 24.

Step 1: Compare denominators. If they are different, rewrite one or both fractions with a common denominator. Step 2: Check the numerators. If the denominators are the same, then the fraction with the greater numerator is the greater fraction.

So 34 is greater than 23 .

2 Answers

• Multiples of 2 are {2,4,6,8,16,…}
• Multiples of 4 are {4,8,12,16,…….)
• Hence common multiples are {4,8,12,16,…} and Lowest Common Multiple is 4 .

Find the least common denominator (LCD) of two fractions

1. Factor each denominator into its primes.
2. List the primes, matching primes in columns when possible.
3. Bring down the columns.
4. Multiply the factors. The product is the LCM of the denominators.
5. The LCM of the denominators is the LCD of the fractions.

Least common multiple (LCM) of 3 and 7 is 21.

For the denominators (5, 1, 8) the least common multiple (LCM) is 40. Therefore, the least common denominator (LCD) is 40.

The least among the common multiples is the LCM of 3, 5, and 8. So, 120 is the least common multiple of 3, 5, and 8.

4 and 7 have 28 and 56 in common BUT the LCM would be 28 since that’s the LEAST common, or the smallest number that they would have in common.

1

18 and 24 share one 2 and one 3 in common. We multiply them to get the GCF, so 2 * 3 = 6 is the GCF of 18 and 24.

11

3

gcf, hcf, gcd (64; 20) = 4 = 2^2: greatest (highest) common factor (divisor), calculated. The numbers have common prime factors.

75

Least Common Multiple of 3, 7, 9 Least common multiple (LCM) of 3, 7, 9 is 63.

A common denominator can always be the product of the two denominators, so 9*7 = 63 is a common denominator. Since one of the denominators is prime, there is no lower common denominator, so the answer is 63.

Greatest common factor (GCF) of 7 and 9 is 1.

Greatest common factor (GCF) of 3 and 4 is 1.

7 = 7. To find the GCF, multiply all the prime factors common to both numbers: Therefore, GCF = 7.

Factors of 15: 1, 3, 5, and 15. Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, and 36. The greatest factor on the two lists that they have in common is the GCF of 15 and 36. Therefore, the GCF of 15 and 36 is 3.