3.1875 as a fraction
Understand the Problem
The question is asking how to express the decimal number 3.1875 as a fraction. To do this, we can convert the decimal part into a fraction and combine it with the whole number part.
Answer
The decimal number 3.1875 can be represented as the fraction $\frac{255}{80}$.
Answer for screen readers
The decimal number 3.1875 can be expressed as the fraction $\frac{255}{80}$.
Steps to Solve
- Separate Whole and Decimal Parts
Identify the whole number part and the decimal part of the decimal number 3.1875.
The whole number part is $3$, and the decimal part is $0.1875$.
- Convert Decimal to Fraction
Convert the decimal $0.1875$ into a fraction. First, recognize that $0.1875$ can be expressed as:
$$ 0.1875 = \frac{1875}{10000} $$
This is because there are four decimal places.
- Simplify the Fraction
Next, simplify the fraction $\frac{1875}{10000}$ by finding the greatest common divisor (GCD) of the numerator and denominator.
The GCD of $1875$ and $10000$ is $125$.
Thus, we divide both the numerator and the denominator by $125$:
$$ \frac{1875 \div 125}{10000 \div 125} = \frac{15}{80} $$
- Combine Whole Number and Fraction
Now, combine the whole number part with the simplified fraction:
$$ 3 + \frac{15}{80} $$
We can convert this to an improper fraction:
$$ \frac{3 \cdot 80 + 15}{80} = \frac{240 + 15}{80} = \frac{255}{80} $$
- Final Simplification (if needed)
Check if the final fraction can be simplified. The GCD of $255$ and $80$ is $1$, thus:
The fraction $\frac{255}{80}$ is already in its simplest form.
The decimal number 3.1875 can be expressed as the fraction $\frac{255}{80}$.
More Information
Converting decimals to fractions is useful in various mathematical applications. The decimal $0.1875$ represents the fraction $\frac{3}{16}$ when simplified, giving us a clearer understanding of its value in fractional terms.
Tips
- Not recognizing how to convert the decimal part into a fraction correctly.
- Forgetting to simplify the fraction before combining it with the whole number.
- Miscalculating the GCD, leading to incorrect simplifications.
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