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A Fraction as a Percent

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Chris S.

Basics on the topic A Fraction as a Percent

Fraction as a Percent – Definition

Understanding how to convert between fractions and percentages is an essential skill in mathematics and everyday life. Whether you're working out discounts, analyzing data, or comparing statistics, knowing how to switch between these formats can provide clearer insights and more accurate calculations. Further, explore this concept with What is Percent & Part of a Whole as a Percent and see how these ideas apply in various scenarios in Applying Percentages to the Real World.

Fraction: A mathematical expression representing a part of a whole, denoted as numeratordenominator\frac{\text{numerator}}{\text{denominator}}.Percent: A way of expressing a number as a part of 100, denoted by the symbol %.

Fraction as a Percent – Explanation

Converting a fraction to a percent involves a simple multiplication by 100, as you are converting a part out of one whole into a part out of one hundred. Conversely, converting a percent back into a fraction involves dividing by 100 and simplifying if necessary.

Converting a Fraction to a Percent

Imagine you have completed 34\frac{3}{4} of a project. To find out what percent of the project is complete, you would convert the fraction to a percent.

Try some more like this on your own!

Concerting a Percent to a Fraction

If a survey shows that 25% of people prefer reading to other hobbies, we can convert this percent into a fraction to simplify data analysis.

Practice converting percent to a fraction.

Converting Between Fraction and Percent

Conversion Type Formula Example
Fraction to Percent (ND)×100\left(\frac{N}{D}\right) \times 100 1250%\frac{1}{2} \rightarrow 50\%
Percent to Fraction Percent100\frac{Percent}{100} 50%1250\% \rightarrow \frac{1}{2}

Fraction as a Percent – Summary

Key Learnings from this Text:

  • Understanding how to convert between fractions and percentages is crucial for practical applications in real-life scenarios.

  • The formulas for converting from a fraction to a percent and vice versa are straightforward but essential for accurate data representation.

Fraction as a Percent – Frequently Asked Questions

Transcript A Fraction as a Percent

Olivia has spent the last months training herself physically and mentally to be ready to battle wildfires. She’s passed every test so far and now she’s reached the last challenge. The firefighters have set a controlled burn in a field at their training center and she must extinguish 85% of the flames, by herself, before sundown. In order to track her progress and accomplish the mission, Olivia will need to convert fractions to percents, and back again. Time is ticking but before grabbing a firehose, Olivia needs to perform some calculations. The whole field is divided into 20 squares. If she needs to extinguish 85% of the field, how many squares IS that? Remember, a percent is a quantity out of 100. That means 85% is the same as the fraction 85 over 100. We can use equivalent fractions to rewrite 85 over 100 to what we need. For this problem, we want to find the equivalent fraction that has 20 in the denominator. 85 over 100 equals WHAT over 20? In order to change the denominator from 100 to 20, we need to divide by 5. But since we want an equivalent fraction, we also have to divide the numerator by 5. Dividing 85 by 5 gives us 17 which tells us 85 percent is equivalent to the fraction seventeen twentieths. Olivia needs to extinguish 17 out of the 20 squares. After a few hours of hard work, she takes a short break giving us time to calculate her progress so far. Olivia has extinguished the fire in 8 squares out of 20. What percentage has she extinguished so far? Let's take a look at the grid. Here are the eight squares where the fire has already been extinguished. On the right side we can write the number of squares in each row: 4, 8, 12, 16 and 20. Hmm, this reminds us of a double number line, so let's put the strip right here and turn it on it's side. The whole is always equal to 100 percent, so we can write that 20 squares is equal to 100 percent. We need to divide the 100 percent into 5 parts. Since 100 divided by 5 is 20, each part is 20 percent. That gives us 20 percent, 40 percent, 60 percent, and 80 percent. Looking at the double number line, that shows us that 8 squares represents 40 percent. That's 40 percent of the fire already extinguished. Olivia just remembered that she can earn a special commendation if she extinguishes at least 90 percent of the field before noon and now that seems like a real possibility. It looks like Olivia has extinguished all the squares but one! Has she earned the special commendation? What is the fraction of the fire that is still burning? One twentieth. What percent is that? Again, a percent is a quantity out of 100. That means we have to find an equivalent fraction with 100 in the denominator. What can we multiply 20 by to get 100? 100 divided by 20 is 5, so we need to multiply the denominator by 5. But since we want to find an equivalent fraction, we also have to multiply the numerator by 5. That gives us 5 over 100, which is equal to 5%. If only 5% is still burning, what percent did Olivia extinguish? 100%, which represents one whole, minus 5% gives us 95%. She did it! While Olivia takes a well-earned rest, let's review. Because percents are a quantity out of 100, we can convert fractions to percents, and vice versa. To convert a percent to a fraction, first write the percent as a fraction with 100 in the denominator. Then multiply or divide the numerator and denominator by the same number to find the equivalent fraction with the denominator you want. To convert a fraction to a percent, we first find what number we need to multiply or divide the denominator by in order to get 100. Then we multiply or divided both the numerator and denominator by that value to get a fraction out of 100. The numerator shows us the percent. This allows us to compare numbers even when they are given in different forms. Congratulations Olivia! With careful conversions of fractions to percents and back, you'll always be able to track your firefighting progress. But what’s this? Hmm, I’m not sure fractions and percents will help here. Olivia has to rescue 100% of the cat!

1 comment
  1. its alright ig

    From Yuri and mint is the best, about 2 years ago

A Fraction as a Percent exercise

Would you like to apply the knowledge you’ve learned? You can review and practice it with the tasks for the video A Fraction as a Percent.