15.5 as a Fraction

15.5 as a fraction is 31/2. As a mixed number that is 15 1/2.

How to convert 15.5 to a fraction

  1. 15.5 has one decimal place, so write it over 10 (a 1 followed by 1 zero) with the decimal point removed: 15.5 = 155/10.
  2. Find the greatest common divisor of 155 and 10: it is 5.
  3. Divide both by 5: 155 ÷ 5 = 31 and 10 ÷ 5 = 2.
  4. The answer is 31/2.

Since 31 is larger than 2, you can also write it as the mixed number 15 1/2: 31 ÷ 2 = 15 remainder 1.

Check

Divide the numerator by the denominator: 31 ÷ 2 = 15.5. As a percent, 15.5 = 1550%.

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Another decimal? Use the decimal to fraction converter or browse the decimal to fraction chart.