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Last updated on August 5th, 2025

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3.9 as a Fraction

Professor Greenline Explaining Math Concepts

Numbers can be categorized into different types. A fraction is one of these types. It is always represented in the form of p/q, where p is the numerator and q is the denominator. A fraction represents a whole and a fractional part. Decimals represent the fractional part of numbers. For example, 1/2 can be expressed as a decimal with a decimal point (.), such as 0.5. We are going to learn how to convert the decimal 3.9 to a fraction.

3.9 as a Fraction for Global Students
Professor Greenline from BrightChamps

What is 3.9 as a Fraction?

3.9 as a fraction

 

Answer

 

The answer for 3.9 as a fraction is 39/10.

 

Explanation

 

Converting a decimal to a fraction is a simple task that can be done easily by following these steps:

 

Step 1: Firstly, any decimal number should be converted to a fraction for easy calculation. Here, 3.9 is our number, and we can express it as 3.9/1.

 

Step 2: To remove the decimal from the fraction, multiply both the numerator and denominator by 10 (because there is only 1 decimal place). 3.9/1 × 10/10 = 39/10

 

Step 3: The fraction 39/10 is already in its simplest form. Therefore, 3.9 is expressed as the fraction 39/10.

 

Thus, 3.9 can be written as the fraction 39/10.

Professor Greenline from BrightChamps

Important Glossaries for 3.9 as a Fraction

  • Fraction: A numerical quantity that is not a whole number, representing a part of a whole.

 

  • Decimal: A number that uses base ten and includes a decimal point to separate the whole part from the fractional part.

 

  • Numerator: The top part of a fraction, indicating how many parts of the whole are being considered.

 

  • Denominator: The bottom part of a fraction, showing how many parts make up a whole.

 

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