12/21 as a percentage is 57.14%. This is the rounded value you get when you change the fraction to a percent. It’s a handy number to remember for quick estimates.
The fraction 12/21 can also be simplified to 4/7, which shows the same proportion in a smaller form. Whether you use 12/21 or 4/7, the percentage stays the same, so you can work with whichever looks easier.
Knowing that 57.14% represents a little more than half helps when you compare parts of a whole. It’s useful in everyday situations like budgeting, grading, or any time you need to see how a portion measures against the total.
