The reciprocal of a/b is b/a
The reciprocal of 7/9 is 9/7
If you are given a mixed number like 1 2/3, then first convert it to an improper fraction using:
[tex]a \frac{b}{c} = \frac{(a\times c) + b}{c}[/tex]
And then you find the reciprocal of it.
Your answer is C. 9/7.
