42/47 as a percentage is 89.36%. This number shows that the fraction is very close to a whole, but just a little bit less.
The fraction 42/47 is a simple way to compare two numbers that are close together. Since the numerator (42) is only five less than the denominator (47), the result is high, which is reflected in the percentage.
In everyday situations, you might see something like this when a test score is 42 correct answers out of 47 questions. Saying you got 89.36% gives a quick, easy‑to‑understand picture of how well you did.