The three forms
The same value can be written as a fraction, a decimal, and a percent: 1 = 1 = 100%.
100% as a Fraction
Explained step by step — with reference tables, charts, and a live converter.
100% as a fraction is 1 (in lowest terms).
Convert any value
Result
Step by step
1. Write it over 100
Percent means “per hundred”, so 100% = 100/100.
2. Reduce
The greatest common divisor of 100 and 100 is 100, so 100/100 = 1.
The fraction visualized
1 of 1 parts shaded
On the number line
This value: 1
Common fractions compared
Fraction ↔ Decimal ↔ Percent
| Fraction | Decimal | Percent |
|---|---|---|
| 1/2 | 0.5 | 50% |
| 1/3 | 0.3333 | 33.33% |
| 2/3 | 0.6667 | 66.67% |
| 1/4 | 0.25 | 25% |
| 3/4 | 0.75 | 75% |
| 1/5 | 0.2 | 20% |
| 2/5 | 0.4 | 40% |
| 1/8 | 0.125 | 12.5% |
| 3/8 | 0.375 | 37.5% |
| 5/8 | 0.625 | 62.5% |
| 7/8 | 0.875 | 87.5% |
| 1/10 | 0.1 | 10% |
| 1/16 | 0.0625 | 6.25% |
About fractions, decimals, and percents
Fractions, decimals, and percents are three ways of writing the same proportion. A fraction is the ratio of two whole numbers, a decimal is the result of dividing them, and a percent is that same number expressed per hundred.
These conversions are pure math and never change — the results on this page are exact, not rounded (except where rounding is explicitly shown).
Related conversions
Frequently asked questions
What is 100% as a Fraction?
100% as a fraction is 1 (in lowest terms).
How do you convert 100% to a fraction?
Write 100% as 100/100, then reduce the fraction fully to 1.
What is 100% as a decimal?
100% equals 1. Divide the percentage by 100.
What does “in lowest terms” mean?
A fraction is in lowest terms (simplest form) when the numerator and denominator share no common factor other than 1. For example, 6/8 can still be reduced, but 3/4 cannot.
Convert more
The fraction & decimal converter covers decimals, fractions, and percents with exact step-by-step solutions.