18/21 as a percentage is 85.71%. This number tells you how much of a whole 18 parts out of 21 represent. It’s a quick way to see the size of the fraction in everyday terms.
The fraction 18/21 can be reduced to 6/7, which is still the same size. Whether you write it as 6/7, 18/21, or 85.71%, the value doesn’t change. All three forms are useful in different situations, like cooking, budgeting, or sports stats.
In real life, you might see 85.71% on a report card, a test score, or a discount. Knowing how to read the percentage helps you compare numbers without doing any math each time. It’s a simple shortcut that works everywhere.
