A girl bought 3 and 3/4 pounds of spinach for $6.88 using the unit rate how much would 1 and 1/2 pounds of spinach cost?

To solve that question you need to figure out how much 1 and 1/2 pounds is compared to 3 and 3/4 pound, and then use that ratio to get the price.

1 and 1/2 pound = 1.5 pound

3 and 3/4 pound = 3.75 pound

1.5/3.75 = 0.4

That means she needs to pay 0,4 of the price of 3 and 3/4 pound

0.4 * 6.88 = 2.75

So the answer is that she needs to pay $2.75 for 1 and 1/2 pound of spinach