Question

A recipe calls for 3/4 of flour per 1/2 tsp oil. how much flour is used per tsp of oil

Answer 1

I'm pretty sure that you just answered the question yourself. Reread what you wrote.

Answer 2

Since it is asking for how much flour PER teaspoon of oil you need to divide the given amount of flour (3/4) by the given amount of oil (1/2).

3/4 / 1/2 = 3/4 x 2/ 1 = 6/4 = 3/2

3/2 of flour per teaspoon of oil