Fractions, Decimals and Percentages
3/4, 0.75 and 75% are the same amount written three different ways. Practise going between them in every direction, until swapping one for another stops feeling like a conversion at all.
No account, and the maths stays in your browser — more— less
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There are not six rules here
There are six directions, and it is tempting to learn a separate trick for each. Do that and the whole thing becomes six things to forget. There is really only one idea: these are three notations for one amount, and each conversion is just rewriting it.
- A fraction is a division. 3/4 means 3 ÷ 4, which is 0.75. That single fact covers fraction-to-decimal for every fraction there is.
- A percentage is hundredths. “Per cent” means “per hundred”, so 0.75 is 75 hundredths, which is 75%.
- A decimal is already a fraction — 0.75 is 75 out of 100. Write it that way, then cancel it down to 3/4.
The one worth memorising anyway
A handful of these come up so often that knowing them outright is genuinely faster than working them out: 1/2 = 0.5 = 50%, 1/4 = 0.25 = 25%, 3/4 = 0.75 = 75%, 1/10 = 0.1 = 10%, 1/5 = 0.2 = 20%. Everything else you can build from those.
Why there are no thirds in here
Because 1/3 has no decimal you can finish writing — it is 0.333… forever. Converting it means rounding, and rounding is a different lesson that would quietly make every answer here approximate. Every fraction in this tool has an exact decimal, which is the honest boundary of the skill rather than a simplification.
School levels
School levels are a guide only. They show where a skill is usually taught in each country and are not taken from, aligned to, or endorsed by any curriculum authority. Your school may cover it earlier or later.