45/66 as a percentage is 68.18%. This number tells you how much of a whole 45 parts out of 66 represent when you look at it in terms of 100. It’s a quick way to compare the fraction to everyday numbers like scores or discounts.
The fraction 45/66 can be simplified to 15/22, which still gives the same value. Fractions like this appear in many real‑world situations, such as recipes, measurements, or probabilities, where you need a part of a whole.
Knowing the percentage makes it easier to communicate the size of the part. For example, if a test score is 45 out of 66 points, you can say the student earned 68.18% of the total points, giving a clear picture of performance.
