Rickey has fraction 7 over 8 of a cup of cereal in a bowl. He then gave two fraction 1 over 4 cups of cereal from his bowl to his little sister. Which of the following best explains the amount of cereal left in Rickey's bowl?

Answer 1

To find the amount of cereal left in Rickey's bowl, we need to subtract the amount he gave to his little sister from the amount he originally had.

Rickey has 7/8 of a cup of cereal in his bowl. He gave 2/4 (which can be simplified to 1/2) of a cup to his little sister.

To subtract fractions, we need to have a common denominator. The denominators in this case are 8 and 2. The least common denominator (LCD) is 8.

Since the first fraction already has a denominator of 8, we don't need to make any changes to it. However, we need to change 1/2 into an equivalent fraction with a denominator of 8.

To do this, we multiply both the numerator and denominator of 1/2 by 4. This gives us 4/8.

Now that both fractions have a denominator of 8, we can subtract them:

7/8 - 4/8 = 3/8.

Therefore, the best explanation for the amount of cereal left in Rickey's bowl is 3/8 of a cup.