Suppose you knew that there was going to be 25 percent inflation between now and five years

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Question:

Suppose you knew that there was going to be 25 percent inflation between now and five years from now, and suppose you knew that the current minimum wage of $7.50 was only enough to get a family of three to 70 percent of the poverty line.

In order to make the minimum wage earn enough to be at that poverty line in five years, the minimum wage in five years would have to be:?

Note from me: please please keep in mind the answer is NOT $9.38, I have already been given that answer before but it is not correct! I do not know the answer, but I do no for a fact that it is not (or not even around, because I have tried) $9.38.