Simplest form answer

15/18 Simplified = 5/6

15/18 in simplest form is 5/6, found by dividing 15 and 18 by their greatest common factor, 3. As a decimal 5/6 is 0.8333..., and as a percent it is 83.3333...%.

Simplified

5/6

Decimal

0.8333...

Percent

83.3333...%

Step-by-step GCF reduction

1. Find the greatest common factor.

The GCF of 15 and 18 is 3.

2. Divide the numerator and denominator by the GCF.

15 ÷ 3 = 5

18 ÷ 3 = 6

3. Write the result.

15/18 simplified is 5/6.

Decimal and percentage equivalents

Decimal equivalent

5/6 = 0.8333...

Percentage equivalent

5/6 = 83.3333...%

Visual fraction bar

83.3333...%

The filled part represents 5/6 of one whole.

Cite this result

Quoting this answer in homework, a lesson plan, or an article? Copy a ready-made citation.

15/18 in simplest form is 5/6, found by dividing 15 and 18 by their greatest common factor, 3.
ILoveFractions, https://www.ilovefractions.com/tools/fraction-simplifier/15-18/, retrieved September 2, 2026

APA

ILoveFractions. (2026). 15/18 Simplified = 5/6. ILoveFractions.com. Retrieved September 2, 2026, from https://www.ilovefractions.com/tools/fraction-simplifier/15-18/

MLA

"15/18 Simplified = 5/6." ILoveFractions.com, https://www.ilovefractions.com/tools/fraction-simplifier/15-18/. Accessed 2 September 2026.

Need to simplify a different fraction?

Use the main fraction simplifier for any numerator and denominator.

Open the Fraction Simplifier