3/42 as a percentage is 7.14%. This is the rounded value you get when you turn the fraction into a percent and keep two decimal places.
The fraction 3/42 can also be simplified to 1/14, which shows the same proportion in a smaller form. Whether you write it as a fraction or a percent, it represents a small part of a whole—just a little over seven percent.
In everyday use, you might see this percentage when dealing with small discounts, test scores, or parts of a group. Remember, 7.14% tells you that out of every 100 units, about seven of them belong to the portion described by 3/42.