Question

This week Nabila worked out for 15 hours as part of her exercise training. Last week she worked out for 17 hours. How much was the percent of decrease of exercise hours this week from last week?

Answer 1

Nabila experienced an approximately 11.76% decrease in exercise hours this week compared to last week, calculated using the percent change formula.

Step-by-step explanation:

To calculate the percent of decrease of exercise hours that Nabila experienced this week from last week, we can use the formula for percent change, which is:

Percent Change = ((New Value - Old Value) / Old Value) × 100%

In this case, last week's workout hours (Old Value) are 17 hours, and this week's workout hours (New Value) are 15 hours. So, the calculation would look like this:

Percent Decrease = ((15 - 17) / 17) × 100%
Percent Decrease = (-2 / 17) × 100%
Percent Decrease = -0.1176 × 100%
Percent Decrease = -11.76%

The negative sign indicates a decrease, so we can say that there was an approximately 11.76% decrease in exercise hours for Nabila this week compared to last week.