Chapter 7: Problem 59
Change each fraction or mixed number to a percent. $$\frac{4}{5}$$
Short Answer
Expert verified
\(\frac{4}{5}\) is 80\%.
Step by step solution
01
Understand the Relationship Between Fractions and Percents
To convert a fraction to a percent, we need to understand that percent means "per hundred." Therefore, our goal is to express the given fraction so that it has a denominator of 100. This way, we can easily see how many parts out of 100 this fraction represents.
02
Convert Fraction to a Decimal
To convert the fraction \(\frac{4}{5}\) to a percent, we first convert it to a decimal. We do this by dividing the numerator by the denominator. So, \(\frac{4}{5} = 4 ÷ 5 = 0.8\).
03
Convert Decimal to a Percent
Now that we have the decimal value of the fraction, we convert it to a percentage by multiplying it by 100. Thus, \(0.8 \times 100 = 80\).
04
Write Final Answer as a Percent
The conversion tells us that \(\frac{4}{5}\) is equal to 80 percent. Therefore, \(\frac{4}{5} = 80\%\).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Fractions to Decimals
The first step in percent conversions involves changing a fraction into a decimal. A fraction is made up of two parts: the numerator, which is the top number, and the denominator, which is the bottom number. To convert a fraction like \(\frac{4}{5}\) into a decimal, we perform a simple division operation. We divide the numerator (4) by the denominator (5). This is essentially asking how many fives fit into four. In this case, dividing 4 by 5 gives us 0.8. This is the decimal representation of the fraction \(\frac{4}{5}\).
- The numerator '4' is divided by
- The denominator '5'
- Resulting in a decimal of '0.8'
Mathematical Operations
Mathematical operations are a set of procedures we use to perform calculations. Converting decimals to percents is a straightforward operation—simply multiply the decimal by 100. This step leverages the idea that "percent" means "per hundred." For example, when converting the decimal 0.8 to a percent, you multiply:
- \(0.8 \times 100 = 80\)
- Multiply the decimal by 100
- Add a percent sign (%) to indicate the conversion
Numerator and Denominator
The terms "numerator" and "denominator" are fundamental to understanding fractions. They help set up the initial step of converting a fraction to both a decimal and a percent.
- The numerator is the "part" of the whole that you are focusing on, such as the '4' in our example \(\frac{4}{5}\).
- The denominator represents the "whole" or total parts into which something is divided, like the '5' in \(\frac{4}{5}\).