10/20 = 50%
The fraction 10/20 represents 50%, a value that shows up often in everyday life. For example, if 10 out of 20 students bring lunch from home, half of the class does so.
You can picture 10/20 quickly by imagining a group split into two equal parts. One full half of a pizza, a progress bar, or a group of 20 objects would give you a good estimate.
A common mistake is thinking that 10/20 is smaller than 1/2 because the numbers look different. They actually describe the same amount, since both represent one equal half.