The three forms
The same value can be written as a fraction, a decimal, and a percent: 9/10 = 0.9 = 90%.
0.9 as a Fraction
Explained step by step — with reference tables, charts, and a live converter.
0.9 as a fraction is 9/10 (in lowest terms).
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Result
Step by step
1. Write it as a fraction
0.9 has 1 decimal place(s), so write it as 9/10.
2. Find the greatest common divisor
The greatest common divisor of 9 and 10 is 1.
3. Reduce
Divide top and bottom by 1: 9/10 = 9/10.
The fraction visualized
9 of 10 parts shaded
On the number line
This value: 0.9
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% |
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).
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Frequently asked questions
What is 0.9 as a Fraction?
0.9 as a fraction is 9/10 (in lowest terms).
How do you convert 0.9 to a fraction?
Write 0.9 as a fraction over a power of ten, then divide the top and bottom by their greatest common divisor to reduce it fully to 9/10. The full steps are shown above.
What is 0.9 as a percent?
0.9 equals 90%. Multiply the decimal by 100.
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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