Question

The sum is rational or irrational number?

Answer 1

a rational number

Explanation:

1) First, find the sum of
`(4)/(7) +(-1)/(3)`:

`(4)/(7) + (-1)/(3) \\= (12)/(21) - (7)/(21) \\= (5)/(21)`

2) Any number that can be written as a fraction is a rational number. Therefore, the sum,
`(5)/(21)`, is rational.