If you've eaten 45% of a box of chocolate cereal that has 13 oz when you buy it, how many oz of the cereal have you eaten?

You have eaten 5.85 oz of the cereal.

Explanation

The weight of the box of chocolate cereal at the time of buying was 13 oz.

Now, you've eaten 45% of a box.

So for finding the amount of the cereal that you have eaten, you need to find 45% of the 13 oz.

So, 45% of 13 oz

Thus, you have eaten 5.85 oz of the cereal.