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What Is 2/3 as a Decimal?
2/3 as a decimal is 0.6666..., a repeating decimal usually written 0.6 with a bar over the 6 (0.6 repeating). You get it by dividing the top number by the bottom number: 2 divided by 3.
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The math
- 2 divided by 3 = 0.6666..., and the 6 repeats forever.
- Written exactly, that's 0.6 with a line over the 6, meaning it never ends.
Rounded, for everyday use
| Rounded to | Value |
|---|---|
| 1 decimal place | 0.7 |
| 2 decimal places | 0.67 |
| 3 decimal places | 0.667 |
As a percentage: multiply by 100 = 66.66...%, usually written about 66.67%.
Why it repeats: a fraction gives a repeating decimal when the bottom number has prime factors other than 2 and 5. Three isn't 2 or 5, so 2/3 never divides evenly and the digits repeat.
Quick check: 1/3 is 0.333..., and 2/3 is just double that — 0.666.... That's an easy way to remember it.
The closest sibling pages are What Is 3/4 as a Decimal? and What Is a Good GPA?.
See the Math & Study Help topic for other answers in this topic, or start from more researched answers.
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Frequently Asked Questions
Is 2/3 equal to 0.67?
0.67 is the rounded version. The exact value is 0.6666... repeating, which rounds to 0.67 at two decimal places.
How do you turn 2/3 into a decimal?
Divide the numerator by the denominator: 2 divided by 3 equals 0.6666..., a repeating decimal.
What is 2/3 as a percentage?
About 66.67 percent. Multiply the decimal 0.6666... by 100 to get 66.66...%, usually rounded to 66.67%.