Percentage Converter — Convert Between Percentages, Decimals, Fractions & Per Mille
Percent, decimal, fraction and per mille are four ways of writing the same quantity. Pick a direction, type a value, and see the other three — already simplified, with the working shown beneath. All four forms update instantly as you type.
Converts to decimal, fraction and per mille.
Plain English
How it works
- Divide the percentage by 100 for the decimal form.
- Write the percentage over 100 to get the raw fraction.
- Divide both parts by their greatest common divisor to simplify.
See it in action
Worked examples
Convert 25% to decimal and fraction
- Decimal: 25 ÷ 100 = 0.25
- Fraction: 25/100, then divide both by 25 → 1/4
Answer: 0.25 and 1/4
Entering a 25% value into a spreadsheet (which stores it as 0.25) or expressing a quarter-share as a fraction.
Convert 50% to decimal and fraction
- Decimal: 50 ÷ 100 = 0.5
- Fraction: 50/100, then divide both by 50 → 1/2
Answer: 0.5 and 1/2
A “half” expressed three ways — useful in recipes, statistics, and spreadsheet formulas alike.
Convert 75% to decimal and fraction
- Decimal: 75 ÷ 100 = 0.75
- Fraction: 75/100, then divide both by 25 → 3/4
Answer: 0.75 and 3/4
Three-quarters of a quantity — common in cooking measurements and progress tracking.
Convert 33.33% to decimal and fraction
- Decimal: 33.33 ÷ 100 = 0.3333
- Fraction: 33.33/100 = 3333/10000 (already in lowest terms); this approximates 1/3
Answer: 0.3333 and ≈ 1/3 (exactly 3333/10000)
A repeating one-third share rounded to two decimals — handy when a clean 1/3 is needed but the source data is rounded.
Answers
Frequently asked questions
How do I convert a percentage to a decimal?
Divide by 100, or move the decimal point two places to the left. 37.5% becomes 0.375.
How do I convert a decimal to a percentage?
Multiply by 100 and add the percent sign. 0.08 becomes 8%.
How do I turn a percentage into a fraction?
Put it over 100 and simplify. 25/100 reduces to 1/4.
What does per mille mean?
Per mille is parts per thousand. 3% is 30 per mille, written 30‰.
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