Question

How do you subtract `-\frac { 6} { 7} - \frac { 5} { 9}`?

Answer 1

See a solution process below:

Explanation:

To add or subtract fractions they must be over a common denominator. We can put both these fractions over a common denominator by multiplying each of them by the appropriate form of `1`:

`-(9/9 xx 6/7) - (7/7 xx 5/9) =>`

`-54/63 - 35/63`

We can now subtract the numerators over the common denominator:

`(-54 - 35)/63 =>`

`-89/63`