1/5 in Words

How to Write 1/5 in Words

Start with the numerator, 1. It is a counting number, so it is written one. Next read the denominator, 5, as the fraction name fifth. Because the numerator is exactly one, the denominator stays singular. Together, the fraction is written one fifth.

Simplifying and Converting 1/5

The greatest common divisor of the numerator represented by this value and the denominator is 1. Because the greatest common divisor is 1, the fraction is already in lowest terms. Its simplified mixed-number or whole-number form is 1/5. Division gives the decimal 0.2. Multiplying that decimal value by 100 gives 20%.

What This Fraction Means

A denominator of 5 divides one whole into 5 equal parts. The numerator 1 counts selected parts. This interpretation remains useful even for improper fractions: the selected parts can combine into one or more complete wholes. A mixed number writes those complete wholes separately, while an improper fraction keeps every part over one denominator. Both notations describe the same value.

Exact Wording Versus Simplest Form

The spoken answer follows the fraction that was entered. That matters because 1/5 and 1/5 can name the same value while using different-sized parts. The simplest form is useful for comparison and calculation, but the original wording can be important in a worksheet, recipe, measurement, or explanation. Number Digit therefore shows both instead of silently replacing the entered fraction.

Using 1/5 in a Sentence

You can write: “The shaded amount is one fifth of the whole.” When a unit follows, the unit normally agrees with the total quantity: “One fifth of a cup” or “One fifth of the distance.” The fraction name itself follows the singular/plural rule shown above.