21/31 = ≈67.74%
Rounded to 2 decimal places.
A value like 21/31, or about 67.74%, can show up when roughly two-thirds of a group shares something. For example, it could describe 21 out of 31 students completing an assignment, customers choosing a certain product, or days in a month with a particular weather pattern.
To picture 21/31 quickly, imagine a group of 31 objects with 21 shaded in. It is a little more than two-thirds, since two-thirds is about 66.7%, so you can estimate it as roughly 68% without needing the exact value.
A common mistake is treating 21/31 as exactly two-thirds just because the numbers look close. It is slightly greater than two-thirds, and the denominator matters because 21 out of 31 is not the same percentage as 21 out of 30 or 21 out of 40.
