Question

calcium 1%
iron 2%

• percent daily values are based on a 2,000 calorie diet.

your daily values may be higher or lower depending on
your calorie needs.
calories 2,000 2,500
total fat less than 65g 80g
saturated fat less than 20g 25g
cholesterol less than 300mg 300mg
sodium less than 2,400mg 2,400mg
total carbohydrate 300g 375g
dietary fiber 25g 30g
andrea wanted to determine the percent of calories in her banana that came from fat. which equation would help andrea calculate this percent?
\\(\frac{4}{0.45} = \frac{x}{100}\\)
\\(\frac{4}{100} = \frac{x}{121}\\)
\\(\frac{4}{100} = \frac{x}{0.45}\\)
\\(\frac{4}{121} = \frac{x}{100}\\)

Explanation:

Step1: Define the proportion

To find the percent of calories from fat, we use the ratio of fat calories to total calories set equal to the unknown percent over 100. Let fat calories = 4, total calories = 121, and the unknown percent = $x$.
The proportion is $\frac{\text{Fat Calories}}{\text{Total Calories}} = \frac{x}{100}$

Step2: Substitute values

Plug in the known values:
$\frac{4}{121} = \frac{x}{100}$

Answer:

$\boldsymbol{\frac{4}{121} = \frac{x}{100}}$ (the last option)