Type a fraction like 3/4, a mixed number like 1 1/2, or a decimal like 0.125. We will reduce and show equivalents.
This page helps you clean up fractions, convert decimals, run fraction arithmetic, and work with ratios without confusion. Enter values as simple fractions like 3/4, mixed numbers such as 1 1/2, or decimals like 0.125. The tool reduces results, shows mixed number form, gives a decimal and a percent, and lets you export a CSV so you can keep a record or share your steps.
If you are learning or double-checking homework, start with Simplify to see lowest terms and mixed numbers. If your source data is in decimals, use Decimal → Fraction to get a neat rational approximation with a cap on the denominator. For quick math between two rational numbers, the Operations tab handles add, subtract, multiply, and divide, and it shows the core formula so you can follow the logic. For recipes, paint mixing, or budget splits, the Ratio tab simplifies A:B, shows each share in percent, and can scale to a target total like 100 units.
The tool prints four core views: simplest fraction, mixed number, decimal, and percent. “Simplest” means numerator and denominator have no common factor other than 1. Mixed number shows any whole part plus a proper fraction. The decimal is rounded to your chosen precision for readability. Percent is just the decimal times 100. For ratios, you will see the original pair, a simplified A:B, each share as a percent of the total, and, if you set it, a scaled split that fits a target sum while keeping the same proportion.
If your inputs are decimals that cannot be represented exactly as a short fraction, Decimal → Fraction uses a continued fraction method with a maximum denominator limit. Lower limits give shorter, more readable results. Higher limits give closer approximations. Pick the one that fits your use case.
Can I enter negatives? Yes. Use a leading minus like -3/5 or -1.25.
Why does the decimal not match exactly? Rounding for display is normal. Increase the precision if you need more digits. The fraction itself is exact unless you use Decimal → Fraction with a tight denominator cap.
What if I only have percentages? Convert 12.5% to decimal 0.125 and use Decimal → Fraction. Or use our Percentage Calculator and come back here for fraction form.
Can I split 3:5 into a 100-unit project? Yes. In Ratio, enter A=3, B=5, set target total to 100, and calculate. You will get A=37.5 and B=62.5 which add to 100.
Where can I do related math? Try the Scientific Notation Calculator and the Math Solvers page. For percent-heavy tasks, use the Percentage Calculator.