Praxis Core Academic Skills for Educators: Mathematics (5733)Number and QuantityMedium
A nutritionist is calculating the caloric content of a meal. A serving of rice contains 200 calories, and a serving of chicken contains 350 calories. If a meal consists of 1/2 serving of rice and 2/3 serving of chicken, what is the total caloric content of the meal?
- A450 calories
- B433.33 calories
- C350 calories
- D333.33 calories
Show answer & explanationAnswer & explanation
Correct answer: B. 433.33 calories
Calculate the calories from each component by multiplying the serving size by its caloric content, then add the results together.
Why the other options are wrong
- A. This is an incorrect sum or calculation error.
- C. This is the caloric content of one full serving of chicken.
- D. This is approximately the calories from chicken only (2/3 * 350).
Fractions in Real-World Contexts
Fractions are used to represent parts of a whole in various real-world scenarios, such as recipes, measurements, or proportions. Calculations involve multiplying quantities by their fractional parts.
- Fractional parts are calculated by multiplication.
- Results often need to be summed for a total.
- Contextual understanding is key to setting up the problem correctly.
Memory trick: Each slice of pie is a fraction, add them up for the whole meal.