Decimal / Percent / Fraction Converter
Enter a decimal, percent, or fraction and convert it to the other formats instantly. Results are simplified and shown with clear steps.
Supported inputs: decimals (1.25), percents (12.5%), fractions (3/4), mixed numbers (2 1/3), negatives. If using percent, “%” is optional when Input type is “Percent”.
Privacy: runs locally in your browser. No inputs are stored or transmitted.
How it works
Conversions are computed from an internal exact fraction representation (numerator/denominator) whenever possible, then displayed as: decimal (rounded for display), percent, and simplified fraction/mixed number.
- Decimal → Percent: decimal × 100
- Percent → Decimal: percent ÷ 100
- Decimal → Fraction: move decimal digits into an integer over 10^k, then simplify
- Fraction → Decimal/Percent: numerator ÷ denominator, then × 100 for percent
Examples
- 0.75 → 75% → 3/4
- 12.5% → 0.125 → 1/8
- 1 1/2 → 1.5 → 150%
- -0.2 → -20% → -1/5
FAQ
- What can this converter convert?
It converts between decimals, percentages, and fractions (including mixed numbers). You can enter one format and get the other two.
- Does it simplify fractions automatically?
Yes. Fraction results are reduced to lowest terms using GCD. Mixed-number form is also shown when the absolute value is at least 1.
- How does decimal to fraction conversion work?
A decimal with k digits after the decimal point is converted to an integer over 10^k, then simplified (e.g., 1.25 = 125/100 = 5/4).
- How does percent conversion work?
Percent means “per 100”. Converting decimal → percent multiplies by 100, and percent → decimal divides by 100.
- Are my inputs stored?
No. Everything runs locally in your browser and inputs are not stored or transmitted.