Activity (Process)

Writing a Decimal from Words

To convert a decimal expressed in words into its numeric form, follow four steps that reverse the naming procedure:

  1. Locate the word "and" — it marks the position of the decimal point. Write a decimal point beneath it. Translate the words before "and" into a whole number and place it to the left of the decimal point. If no "and" appears, write 00 followed by a decimal point.
  2. Determine the number of decimal places — read the last word, which names a place value (tenths, hundredths, thousandths, etc.), and count the corresponding number of decimal places needed to the right of the decimal point.
  3. Translate the words after "and" into digits — convert the fractional part, expressed as a word-form whole number, into digits and write them in the reserved decimal places, placing the final digit in the last (rightmost) position.
  4. Insert placeholder zeros — if the translated digits do not fill all the decimal places, fill the remaining positions (between the decimal point and the first nonzero digit) with zeros.

For example, "three and twenty-seven thousandths" becomes 3.0273.027: the word "and" places the decimal point after 33, "thousandths" indicates three decimal places, "twenty-seven" translates to 2727, and a leading zero is needed to fill the tenths place. This procedure is the exact reverse of naming a decimal in words, and it mirrors the way whole numbers are written from their word forms.

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Updated 2026-04-21

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