Least common multiple of 5,6,7

Question

put 1/6,2/5,3/7 and 3/5 from least to greatest

Answer 1

W e can compare fractions with the same numerators ( for example 2/5 , 2/7, 2/9),
or fractions with the same denominators.
5 is a prime number, 6 = 2·3 and 7 is a prime number. Since those number do not have common factors, the least common multiple will be their product: 5·6·7 = 210 .
For fractions 1/6 , 2/5 , 3/7 , 3/5  "210" will be the LCD (Least Common Denominator)
1·35/210 , 2·42/210 , 3·30/210 , 3·42/210
  35/210      84/210      90/210     126/210
Given fractions are already in order from least to greatest.

Answer 2

35/210,84/210, 90/210, and 126/210