Answer: C. Twenty-four is 40% of what number
Step-by-step explanation:
Let the answer in each question is x,
Then in A) What is 40% of 24
In B) What percent is 24 of 40,
In C) Twenty-four is 40% of what number
In D) Forty percent of 24 is what number,
Thus, in problem C the given expression will use.