Welcome to Bytelearn!

Let’s check out your problem:

Enzo's favorite chocolate chip cookie recipe calls for $1$ teaspoon of salt for every $2 \frac{1}{4}$ cups of flour. He currently has $1 \frac{1}{2}$ cups of flour in his flour jar and $4 \frac{1}{2}$ cups of flour in a bag. If Enzo wants to use up all of his flour to make chocolate chip cookies, how many teaspoons of salt does he need?