The answers are:
2/9 and 7/2
Explanation:
The reciprocal of a number is a special number such that, when multiplied by the original number, gives us 1.
And we know that in fractions, to get from a/b to 1, we should multiply a/b times b/a.
So this leads to the conclusion that the reciprocal of 9/2 is 2/9 and the reciprocal of 4/7 is 7/2.