Question

2/5 + 2/7

Answer 1

To add fractions, you need a common denominator.

Answer 2

What is the least common multiple of 5 and 7?

Answer 3

5?

Answer 4

is it 24/35

Answer 5

5 is not a multiple of 7.
You need a number that is a multiple of both 5 and 7.
One way to find the smallest such number is to list the first several multiples of each number, 5 and 7, and find the smallest that appears in both lists.

Answer 6

Yes, 35 is the LCM.

\( \dfrac{2}{5} + \dfrac{2}{7} \)

\(= \dfrac{2}{5} \times \dfrac{7}{7} + \dfrac{2}{7} \times \dfrac{5}{5} \)

\(= \dfrac{14}{35} + \dfrac{10}{35} \)

\(= \dfrac{24}{35} \)

Answer 7

You are correct. 24/35 is the sum.