42/48 = 87.5%
A value like 42/48, or 87.5%, could describe getting 42 questions right out of 48 on a quiz. It might also represent finishing 42 of 48 tasks, attending most of a 48-day program, or having 42 successful results out of 48 tries.
To picture it quickly, imagine a group of 48 objects with only 6 missing or unfinished. That means the amount is just a little less than seven-eighths, so it is close to 90% but not quite there.
A common mistake is treating 42/48 as if it were 42%, since the numerator is 42. The 42 and 48 describe parts of the same whole, so the fraction represents a much larger percentage than 42%.