Question

Express each of the following as a rational number 3/7+(-2/9)+7/9​

Answer 1

=62/63

=
`(62)/(63)`

Explanation:

Convert everything to a denominator 63

=
`=(3*9)/(63) +-(2*7)/(63) +(7*7)/(63)`

=
`(27)/(63) +(-14)/(63) +(49)/(63)\\`

Add up the numerators

=
`(62)/(63)`