21/30 as a percentage is 70.00%. This number shows how the fraction relates to a whole when expressed in everyday terms.
The fraction 21/30 can be simplified to 7/10, which is an easy way to see that it’s a little less than three‑quarters of a whole. In decimal form it is 0.7, matching the percentage nicely.
When you need to compare parts of a whole—like grades, discounts, or test scores—turning a fraction into a percentage makes it clearer. A value of 70.00% tells you that the part is seven‑tenths of the total.
Remember, a percentage is just another way to talk about a fraction. Whether you’re working with 21/30 or 70.00%, both give you the same information about size and proportion.
