15/40 as a percentage is 37.50%. This value shows how much of a whole the fraction represents when we talk in terms of parts per hundred.
The fraction 15/40 can be reduced to 3/8, which is a simpler way to see the same portion. Both forms describe the same amount, just with different numbers.
In everyday life, you might see 37.50% on a test score, a discount, or a statistic. Knowing the percentage helps you compare it quickly with other numbers that are also expressed out of 100.
