Answer :
To determine the percentage of calories in the hamburger that come from fat, we can follow these steps:
1. Understand the Basics:
- A quarter-pound fast-food hamburger sandwich has a total of 400 calories.
- It contains 20 grams of fat.
2. Calories from Fat:
- Each gram of fat provides 9 calories.
- So, to find out how many calories come from fat, multiply the grams of fat by the calories per gram of fat:
[tex]\[
\text{Calories from fat} = 20 \, \text{grams} \times 9 \, \text{calories/gram} = 180 \, \text{calories}
\][/tex]
3. Calculate the Percentage:
- To calculate the percentage of total calories that are from fat, divide the calories from fat by the total number of calories and then multiply by 100 to convert it into a percentage:
[tex]\[
\text{Percentage of calories from fat} = \left(\frac{180 \, \text{calories}}{400 \, \text{calories}}\right) \times 100 = 45\%
\][/tex]
Therefore, 45 percent of the calories in the hamburger come from fat. The correct choice is d. 45 percent.
1. Understand the Basics:
- A quarter-pound fast-food hamburger sandwich has a total of 400 calories.
- It contains 20 grams of fat.
2. Calories from Fat:
- Each gram of fat provides 9 calories.
- So, to find out how many calories come from fat, multiply the grams of fat by the calories per gram of fat:
[tex]\[
\text{Calories from fat} = 20 \, \text{grams} \times 9 \, \text{calories/gram} = 180 \, \text{calories}
\][/tex]
3. Calculate the Percentage:
- To calculate the percentage of total calories that are from fat, divide the calories from fat by the total number of calories and then multiply by 100 to convert it into a percentage:
[tex]\[
\text{Percentage of calories from fat} = \left(\frac{180 \, \text{calories}}{400 \, \text{calories}}\right) \times 100 = 45\%
\][/tex]
Therefore, 45 percent of the calories in the hamburger come from fat. The correct choice is d. 45 percent.
