Simplest form answer

18/20 Simplified = 9/10

18/20 in simplest form is 9/10, found by dividing 18 and 20 by their greatest common factor, 2. As a decimal 9/10 is 0.9, and as a percent it is 90%.

Simplified

9/10

Decimal

0.9

Percent

90%

Step-by-step GCF reduction

1. Find the greatest common factor.

The GCF of 18 and 20 is 2.

2. Divide the numerator and denominator by the GCF.

18 ÷ 2 = 9

20 ÷ 2 = 10

3. Write the result.

18/20 simplified is 9/10.

Decimal and percentage equivalents

Decimal equivalent

9/10 = 0.9

Percentage equivalent

9/10 = 90%

Visual fraction bar

90%

The filled part represents 9/10 of one whole.

Cite this result

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18/20 in simplest form is 9/10, found by dividing 18 and 20 by their greatest common factor, 2.
ILoveFractions, https://www.ilovefractions.com/tools/fraction-simplifier/18-20/, retrieved September 2, 2026

APA

ILoveFractions. (2026). 18/20 Simplified = 9/10. ILoveFractions.com. Retrieved September 2, 2026, from https://www.ilovefractions.com/tools/fraction-simplifier/18-20/

MLA

"18/20 Simplified = 9/10." ILoveFractions.com, https://www.ilovefractions.com/tools/fraction-simplifier/18-20/. Accessed 2 September 2026.

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