Emma enjoys taking part in races and keeps track of all of her finishing times. At a race last month, she finished in 210 minutes. At her next race, she finished 10% faster. What was her time at her most recent race?

To find Emma's time at her most recent race, we need to determine what "10% faster" means in terms of her time.

If Emma finished 10% faster, she completed the race in 90% of her original time. This is because:

- 100% - 10% = 90%

Now we can calculate her most recent time by multiplying her previous time by 90% (or 0.90):

\[
\text{New time} = 210 \times 0.90 = 189 \, \text{minutes}
\]

So, Emma's time at her most recent race was **189 minutes**.

Would you like a more detailed explanation or have any questions?

Here are five related questions to practice:

1. If Emma finishes her next race 15% faster than her previous race of 210 minutes, what will her new time be?
2. How much time did Emma save by finishing the race 10% faster than before?
3. If Emma finishes her next race 5% slower than her most recent race of 189 minutes, what will her time be?
4. If Emma's first race took her 300 minutes and her second race 10% less time, what was her time for the second race?
5. How long would it take Emma to finish a race if she was 20% faster than 210 minutes?

**Tip:** When a value changes by a percentage, multiplying by \( 1 \pm \frac{\text{percentage}}{100} \) gives the new value.

Emma enjoys taking part in races and keeps track of all of her finishing times. At a race last month, she finished in 210 minutes. At her next race, she finished 10% faster. What was her time at her most recent race?

Find out how to calculate a faster race time using percentages. Emma's original race time was 210 minutes, and she completed her next race 10% faster. Learn how to use multiplication to solve percentage problems in this step-by-step guide for students in Grades 5-7.

Math Problem Statement

Solution

Ask a new question for Free

By Image

Math Problem Analysis

Mathematical Concepts

Formulas

Theorems

Suitable Grade Level

Related Recommendation