40/58 as a percentage is 68.97%. This number tells you how much of a whole the fraction represents when you look at it in terms of 100 parts.
The fraction 40/58 can be simplified by dividing both the numerator and the denominator by 2, giving you 20/29. Even though the simplified form looks different, it still equals the same value and therefore the same percentage.
You might see this kind of fraction when comparing scores, such as getting 40 correct answers out of 58 questions on a test. Knowing that it equals 68.97% helps you quickly understand how well you performed without having to work with the raw numbers.
