One third
What is one third as a decimal and percent?
One third is 1/3, the repeating decimal 0.333…, and 33.333…%.
One third
The decimal repeats forever, so 0.33 is only a rounded approximation while 1/3 remains exact.
Useful when a whole is divided into three equal shares.
- Decimal
- 0.(3)
- Percent
- 33.(3)%
- Mixed number
- 1/3
Calculated locally
Enter two fractions
Exact result
1/3
- Improper fraction
- 1/3
- Mixed number
- 1/3
- Decimal
- 0.(3) Repeating decimal
- Percent
- 33.(3)% Repeating decimal
Exact formula
1/3 → 1/3Common divisor used to reduce: 1
Exact reference
Common fraction equivalents
Finite decimals are shown in full. An ellipsis marks a repeating value, so the fraction remains the exact reference.
| Fraction | Decimal | Percent | Common use |
|---|---|---|---|
| 1/2 | 0.5 | 50% | Two equal parts |
| 1/3 | 0.(3) | 33.(3)% | Three equal parts |
| 2/3 | 0.(6) | 66.(6)% | Two of three parts |
| 1/4 | 0.25 | 25% | Four equal parts |
| 3/4 | 0.75 | 75% | Three of four parts |
| 1/5 | 0.2 | 20% | Five equal parts |
| 2/5 | 0.4 | 40% | Two of five parts |
| 3/5 | 0.6 | 60% | Three of five parts |
| 4/5 | 0.8 | 80% | Four of five parts |
| 1/8 | 0.125 | 12.5% | Eight equal parts |
| 3/8 | 0.375 | 37.5% | Three of eight parts |
| 5/8 | 0.625 | 62.5% | Five of eight parts |
| 7/8 | 0.875 | 87.5% | Seven of eight parts |