40.00% is what 18/45 equals when expressed as a percentage.
The fraction 18/45 can be reduced to 2/5, which is a simple way to see the same value without a calculator. Both the reduced fraction and the percentage tell you that the part is less than half of the whole.
In everyday terms, if you have 45 pieces of something and you take 18 of them, you are taking exactly 40 % of the total. This makes it easy to compare portions, plan budgets, or understand data in reports.
