Chapter 6: Problem 6
Convert each complex decimal to a fraction or mixed number. Be sure to reduce. \(0.12 \frac{2}{5}\)
Short Answer
Expert verified
The complex decimal \(0.12 \frac{2}{5}\) converts to the fraction \(\frac{13}{25}\).
Step by step solution
01
Separate the Mixed Decimal
The given number is a complex decimal: \(0.12 \frac{2}{5}\). Recognize that it can be separated into a decimal part \(0.12\) and a fractional part \(\frac{2}{5}\).
02
Convert Decimal to Fraction
Convert the decimal part \(0.12\) to a fraction. We know that \(0.12 = \frac{12}{100}\). Simplify this fraction by dividing the numerator and denominator by their greatest common divisor, which is 4. This gives us \(\frac{3}{25}\).
03
Add the Fractions
Now we need to combine the fractions \(\frac{3}{25}\) and \(\frac{2}{5}\). First, convert \(\frac{2}{5}\) into a fraction with a denominator of 25 by multiplying both the numerator and the denominator by 5. This gives \(\frac{10}{25}\).
04
Simplify the Result
Add \(\frac{3}{25}\) and \(\frac{10}{25}\) by adding the numerators: \(3 + 10 = 13\). The resultant fraction is \(\frac{13}{25}\).
05
Finalize the Answer
Since \(\frac{13}{25}\) cannot be reduced further (13 is a prime number and does not divide 25), this is the final answer. The complex decimal \(0.12 \frac{2}{5}\) converts to the fraction \(\frac{13}{25}\).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Complex Decimals
Complex decimals are numbers that include both a decimal and a fractional component. They can seem intimidating at first because they blend these two different representations of numbers. However, transforming them into a more uniform expression like a fraction or a mixed number can make things much simpler.When handling a complex decimal such as \(0.12 \frac{2}{5}\), it is important to break it down into manageable parts. This means separating the decimal part (in this case, 0.12) and the fractional part (\(\frac{2}{5}\)), each of which is converted separately before being combined into a single fraction.
Mixed Decimals
Mixed decimals have components that are both decimal parts and fractional parts. Understanding how to work with them is a critical skill as they often appear in real-world problems.Begin by observing each part of the mixed decimal separately. For example, in \(0.12 \frac{2}{5}\), you treat the decimal (0.12) and the fraction (\(\frac{2}{5}\)) as two separate entities that will ultimately combine into one.The process involves converting the decimal to a fraction, followed by adjusting and combining it with the fractional part. This helps in simplifying calculations and helps unify the expression into a single fraction.
Fraction Simplification
Fraction simplification is a crucial step in converting decimals to fractions efficiently. It involves reducing a fraction to its simplest form by dividing both the numerator and the denominator by their greatest common divisor.For instance, when you convert the decimal 0.12 to a fraction, you get \(\frac{12}{100}\). The greatest common divisor of 12 and 100 is 4. By dividing both the numerator and denominator by 4, you simplify the fraction to \(\frac{3}{25}\). This practice not only makes calculations easier but also ensures the results are presented in their simplest form, which is always preferred.
Adding Fractions
Adding fractions requires a common denominator. If fractions have different denominators, it's important to adjust them so they share the same one—this allows for straightforward addition.Take the example of \(\frac{3}{25}\) and \(\frac{2}{5}\). These fractions have different denominators, 25 and 5 respectively. To add them, convert \(\frac{2}{5}\) into a fraction with a denominator of 25. Multiply both numerator and denominator by 5 to get \(\frac{10}{25}\).Once both fractions share the same denominator, simply add the numerators: \(3 + 10 = 13\). This results in the fraction \(\frac{13}{25}\), which, in this case, is already in its simplest form.