It's very simple to write a fraction (a proportion or a ratio) or a decimal number as a percentage.
To convert a fraction:
- - start by dividing the numerator by the denominator
- - then multiply the result by 100%
- By multiplying the result by 100% the value we've got at the previous step is not modified, since 100% = 100/100 = 1
- By multiplying by 100% only the form is being changed - it's written as a percentage.
It's even simpler to write an integer or decimal number as a percentage:
- - simply multiply the number by 100%
Examples
- ^{1}/_{4} = 0.25 = 0.25 × 100% = (0.25 × 100)% = 25%;
- ^{7}/_{8} = 0.875 = 0.875 × 100% = (0.875 × 100)% = 87.5%
- ^{1.3}/_{9.4} ≈ 0.138297 = 0.138297 × 100% = (0.138297 × 100)% = 13.8297%
- 4.3 = 4.3 × 100% = (4.3 × 100)% = 430%;