Convert any fraction into a percentage in seconds. This is useful for test scores, budgeting, discounts written as fractions, and probability. A fraction is a part divided by a whole; to turn it into a percentage you first convert it to a decimal by dividing the numerator by the denominator, then multiply by 100.
For example, 3/4 = 0.75, which is 75%. This calculator also works with improper fractions (like 5/2), which become percentages above 100%. If your denominator is zero, the fraction is undefined, so the calculator will prompt you to correct the input.
Formula: (numerator ÷ denominator) × 100.
Steps: 3 ÷ 4 = 0.75; 0.75 × 100
Result: 75.00%
Steps: 5 ÷ 2 = 2.5; 2.5 × 100
Result: 250.00%
Divide the numerator by the denominator, then multiply by 100.
Yes. Improper fractions (where the numerator is larger) convert to percentages above 100%.
The fraction is undefined, so you need a non‑zero denominator.
You don’t have to — simplifying doesn’t change the value, only the appearance.