The three forms
The same value can be written as a fraction, a decimal, and a percent: 9/20 = 0.45 = 45%.
9/20 as a Decimal
Explained step by step — with reference tables, charts, and a live converter.
9/20 as a decimal is 0.45.
Convert any value
Result
Step by step
1. Set up the division
A fraction means numerator ÷ denominator, so 9 ÷ 20.
2. Divide
Carry out the division: 9 ÷ 20 = 0.45.
The fraction visualized
9 of 20 parts shaded
On the number line
This value: 0.45
Common fractions compared
Fraction ↔ Decimal ↔ Percent
| Fraction | Decimal | Percent |
|---|---|---|
| 1/2 | 0.5 | 50% |
| 1/3 | 0.3333 | 33.33% |
| 2/3 | 0.6667 | 66.67% |
| 1/4 | 0.25 | 25% |
| 3/4 | 0.75 | 75% |
| 1/5 | 0.2 | 20% |
| 2/5 | 0.4 | 40% |
| 1/8 | 0.125 | 12.5% |
| 3/8 | 0.375 | 37.5% |
| 5/8 | 0.625 | 62.5% |
| 7/8 | 0.875 | 87.5% |
| 1/10 | 0.1 | 10% |
| 1/16 | 0.0625 | 6.25% |
Rounded to 1–6 decimal places
| Decimal places | 9/20 |
|---|---|
| 1 | 0.5 |
| 2 | 0.45 |
| 3 | 0.45 |
| 4 | 0.45 |
| 5 | 0.45 |
| 6 | 0.45 |
About fractions, decimals, and percents
Fractions, decimals, and percents are three ways of writing the same proportion. A fraction is the ratio of two whole numbers, a decimal is the result of dividing them, and a percent is that same number expressed per hundred.
These conversions are pure math and never change — the results on this page are exact, not rounded (except where rounding is explicitly shown).
Related conversions
Frequently asked questions
What is 9/20 as a Decimal?
9/20 as a decimal is 0.45.
How do you convert 9/20 to a decimal?
Divide the numerator 9 by the denominator 20. The result is 0.45.
What is 9/20 as a percent?
9/20 equals 45%.
What does “in lowest terms” mean?
A fraction is in lowest terms (simplest form) when the numerator and denominator share no common factor other than 1. For example, 6/8 can still be reduced, but 3/4 cannot.
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