Question

A body builder consumed 4,400 calories yesterday. Today, he consumed 3,600 calories.
What is the percent decrease in number of calories consumed? Round to the nearest percent.

%

Answer 1

To find the percent decrease in the number of calories consumed from yesterday to today, we can follow these steps:

1. Calculate the decrease in calories:
\[
\text{Decrease} = \text{Calories yesterday} - \text{Calories today} = 4400 - 3600 = 800 \text{ calories}
\]

2. Calculate the percent decrease using the formula:
\[
\text{Percent Decrease} = \left(\frac{\text{Decrease}}{\text{Calories yesterday}}\right) \times 100
\]
\[
\text{Percent Decrease} = \left(\frac{800}{4400}\right) \times 100
\]

3. Simplify the fraction:
\[
\frac{800}{4400} = \frac{8}{44} = \frac{2}{11} \approx 0.1818
\]

4. Calculate the percent decrease:
\[
\text{Percent Decrease} \approx 0.1818 \times 100 \approx 18.18\%
\]

5. Round to the nearest percent:
\[
\text{Rounded Percent Decrease} = 18\%
\]

Thus, the percent decrease in the number of calories consumed is **18%**.