12. a box of cereal states that there are 90 calories in a $\frac{3}{4}$ -cup serving. how many calories are…

12. a box of cereal states that there are 90 calories in a $\frac{3}{4}$ -cup serving. how many calories are there in 4 cups of the cereal?

12. a box of cereal states that there are 90 calories in a $\frac{3}{4}$ -cup serving. how many calories are there in 4 cups of the cereal?

Answer

Explanation:

Step1: Find calories per cup

Let $x$ be calories per cup. We know $\frac{3}{4}$ cup has 90 calories. So $x=\frac{90}{\frac{3}{4}}$. $x = 90\times\frac{4}{3}=120$ calories per cup.

Step2: Calculate calories in 4 cups

Multiply calories per cup by 4. So calories in 4 cups $=120\times4$. $120\times4 = 480$ calories.

Answer:

480