Arithmetic · real student question

Write the mixed number 4 2/3 as an improper fraction.

Question

Convert the mixed number

4234\frac{2}{3}

to an improper fraction.

Step-by-step solution

  1. Understand what the mixed number means. A mixed number is a sum in disguise:

    423=4+234\frac{2}{3} = 4 + \frac{2}{3}

    An improper fraction writes that whole sum over the single denominator 33, so the job is to convert the 44 wholes into thirds and add on the thirds you already have.

  2. Multiply the whole number by the denominator. Each whole equals 33\tfrac{3}{3}, i.e. 33 thirds, so 44 wholes are

    4×3=124 \times 3 = 12

    thirds in total. This is the step the shortcut “multiply, add, keep the bottom” compresses.

  3. Add the numerator. Now include the extra 23\tfrac{2}{3}:

    12+2=1412 + 2 = 14

    so there are 1414 thirds altogether.

  4. Keep the original denominator. The size of each piece never changed — only how many you are counting — so the denominator stays 33:

    423=1434\frac{2}{3} = \frac{14}{3}

    Combining as fractions gives the same thing: 123+23=143\tfrac{12}{3} + \tfrac{2}{3} = \tfrac{14}{3}.

  5. Sanity-check the size and the form. Because the denominator is 33, each whole unit is three thirds, so the four wholes alone contribute 4×3=124 \times 3 = 12 thirds. Counting on the picture: four full pies cut into thirds give 1212 slices, and two more slices makes 1414.

  6. Reverse the process to confirm. Dividing back, 14÷3=414 \div 3 = 4 remainder 22, which rebuilds 4234\frac{2}{3} exactly. As a decimal both forms equal 4.6666666666666674.666666666666667, so the conversion is verified in both directions.

Answer

423=1434\frac{2}{3} = \frac{14}{3}

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