21/27 as a percentage is 77.78%. This number tells you how much of a whole the fraction represents when you look at it in terms of hundredths. It’s a quick way to see the size of the fraction at a glance.
The fraction 21/27 can be simplified by dividing both the numerator and the denominator by 3, which gives you 7/9. Even though it’s a smaller fraction, it still represents the same portion of a whole, and the percentage stays the same.
Knowing the percentage helps when you compare this part to other values, especially in everyday situations like grades, discounts, or statistics. A value of 77.78% shows that the fraction is a little under four‑fifths of a whole.
