Mary thinks that a quarter-pound hamburger is heavier than a 5 oz hamburger. Explain why she is incorrect.

5/16 is greater than 4/16

Mary is incorrect because a quarter-pound hamburger is actually lighter than a 5 oz hamburger. To understand why, we need to convert both measurements into the same unit of measurement.

First, let's convert a quarter-pound into ounces. Since there are 16 ounces in a pound, a quarter-pound is 1/4 * 16 = 4 ounces.

So, a quarter-pound hamburger weighs 4 ounces.

On the other hand, a 5 oz hamburger weighs 5 ounces.

Now, we can clearly see that a 5 oz hamburger weighs more than a quarter-pound hamburger.