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W.4 Convert decimals to mixed numbers

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Convert decimals to mixed numbers

Converting decimals to mixed numbers means changing a decimal number into a number that includes a whole number part and a fractional part. The fractional part shows the decimal as a fraction of a whole.

Example:
  • 2.5 → 2 12
  • 3.75 → 3 34
Note

A mixed number always has a whole number and a fraction. The fraction represents the part left over after the decimal point.

Steps to convert a decimal to a mixed number

Follow these clear steps to convert any decimal into a mixed number.

Steps:
  • Step 1: Identify the whole number part. It is the number before the decimal point.
  • Step 2: Look at the decimal part and say it as a fraction. For example, 0.25 means twenty-five hundredths, or 25100.
  • Step 3: Simplify the fraction if possible. 25100 simplifies to 14.
  • Step 4: Combine the whole number and the fraction to write the mixed number. For example, 2.25 = 2 14.
Note

Always reduce the fraction to its simplest form. Divide both the numerator (top number) and the denominator (bottom number) by their greatest common factor.

Examples of converting decimals to mixed numbers

Let’s look at some examples to see how decimals become mixed numbers.

Examples:
  • 4.5 → 4 12
  • 1.25 → 1 14
  • 5.2 → 5 15
  • 7.75 → 7 34
Note

If the decimal has one digit after the point, it usually becomes tenths. If it has two digits, it becomes hundredths. Simplify every time you can.

Checking your work

To check your answer, convert the mixed number back into a decimal. If it matches the original number, your answer is correct.

Example:
  • 3 34 → 3 + 34 = 3.75 ✔
Note

Practicing both converting and checking helps you understand the relationship between decimals and fractions.