45/65 as a percentage is 69.23%. This is the simplest way to see the fraction turned into a familiar number you can use in everyday situations.
The fraction 45/65 can also be reduced to 9/13, which still gives the same percentage when you calculate it. Seeing it as 69.23% helps you compare it quickly with other percentages, like a test score or a discount.
In practical terms, if you had 65 items and you took 45 of them, you would have taken about 69.23% of the total. This makes it easy to understand the size of the part compared to the whole.