Simplify 5/15

5/15 simplified is 1/3, after dividing the top and bottom by 5.

Result

Answer

\frac{5}{15} = \textcolor{#0b5c56}{\frac{1}{3}}

5/15 simplifies to 1/3.

  • Greatest common factor: 5
  • Decimal: \displaystyle 0.\overline{3} (the 3 repeats forever, about 0.3333)
  • Percent: 33.33%
5/151/3

Same amount, fewer parts

Step-by-step solution

The problem

\frac{5}{15}

  1. Find the greatest common factor. List the factors of each:
    Factors of 5: 1, 5
    Factors of 15: 1, 3, 5, 15
    The greatest common factor (GCF) is 5.

    \text{GCF}(5, 15) = 5

  2. Divide the top and bottom by 5. Dividing both by the same number keeps the value the same.

    = \frac{5 \div 5}{15 \div 5} = \textcolor{#0b5c56}{\frac{1}{3}}

All the working together

\begin{aligned} &\frac{5}{15} \\[8pt] &= \frac{5 \div 5}{15 \div 5} && \textcolor{#5b6660}{\textsf{divide by 5}} \\[8pt] &= \textcolor{#0b5c56}{\frac{1}{3}}\end{aligned}

5/15 in other forms

Simplest form1/3
Greatest common factor5
Decimal0.333… (the 3 repeats forever)
Percent≈ 33.33%
Equal fractions2/6, 3/9, 4/12, 6/18

Fractions over 15 simplified

FractionSimplest formDecimal
1/15already simplest0.0666…
2/15already simplest0.1333…
3/151/50.2
4/15already simplest0.2666…
5/151/30.333…
6/152/50.4
7/15already simplest0.4666…
8/15already simplest0.5333…
9/153/50.6
10/152/30.666…
11/15already simplest0.7333…
12/154/50.8
13/15already simplest0.8666…
14/15already simplest0.9333…

Frequently asked questions

What is 5/15 in simplest form?

5/15 simplifies to 1/3. Divide the top and bottom by 5, their greatest common factor: 5 ÷ 5 = 1 and 15 ÷ 5 = 3.

What is the greatest common factor of 5 and 15?

The GCF of 5 and 15 is 5 – the biggest number that divides both with nothing left over.

Is 5/15 equal to 1/3?

Yes. Both are 0.333… (≈ 33.33%). Simplifying changes how the fraction is written, not its value.

More fractions to simplify

Any other fraction or mixed number: use the Simplify Fractions Calculator.