12/87 as a percentage is 13.79%. This is the rounded value you get when you express the fraction in terms of a whole hundred.
The fraction 12/87 can be simplified only a little, because 12 and 87 share a factor of 3. Dividing both numbers by 3 gives 4/29, which is still a small part of a whole. Seeing it as a percentage makes it easier to compare with other numbers you might encounter in everyday life.
When you think about 13.79%, picture it as about 14 out of every 100 parts. It’s a handy way to understand the size of the fraction without dealing with the division directly, and it works well in reports, charts, or quick calculations.