45/100 as a percentage is 45.00%. This number tells you that the fraction represents forty‑five parts out of one hundred, which is the same as saying 45 percent. It’s a straightforward way to compare parts of a whole.
When you see 45/100, you can think of it as a slice of a pie that is a little less than half. In everyday language, saying “45 percent” is often clearer than using the fraction, especially in reports or charts.
Both the fraction and the percentage are useful. The fraction works well for exact math, while the percentage is great for quick understanding and communication. Use whichever fits the situation best.