10/30 as a percentage is 33.33%. This fraction can be reduced to 1/3, which is a common way to think about it in everyday situations. The rounded result makes it easy to compare with other percentages you might see on a report card or a budget.
When you see 10/30 in a chart, you’re really looking at one part out of three equal parts. That “one‑third” idea helps you quickly understand that the value is just a little over a third of the whole, which is exactly what 33.33% tells you.
In practical terms, 33.33% might show up as a portion of a class that completed a project, a slice of a pie chart, or the share of a budget spent on supplies. Knowing the percentage lets you communicate the size of the part without having to write the fraction every time.