18/40 as a percentage is 45.00%. This tells you that the fraction represents just under half of a whole.
The fraction 18/40 can be simplified to 9/20, which still keeps the same value. Seeing it in its simplest form helps when comparing it to other fractions or when working with measurements.
In everyday situations, a 45.00% figure might describe a test score, a discount, or the portion of a project that’s finished. Knowing the percentage makes it easy to communicate the size of the part relative to the whole.
