What is 18/45 as a percentage? It is 40.00%. This number tells you how much of a whole 18 parts out of 45 represent when you look at it in terms of 100.
The fraction 18/45 can be reduced to 2/5, which is a simple way to see the same value. Whether you write it as 18/45, 2/5, or 40.00%, the meaning doesn’t change – it’s the same portion of a whole.
Percentages like 40.00% are handy because they let you compare parts of different things easily. In everyday life you might hear that a sale gives you a 40% discount, or that a test score is 40% correct. Knowing the percentage helps you understand the size of the part quickly.
