42/100 = 42%
A value of 42% might show up in a weather forecast, a survey, or a sale showing how much of a group chose one option. It means the share is less than half, but still close to it.
To picture 42 out of 100, imagine 100 small squares with 42 shaded in. For a quick estimate, think of it as a little less than half, since half of 100 is 50.
A common mix-up is treating 42% as the same as 42 whole items, no matter what the total is. It means 42 out of every 100, so the actual number of items depends on the size of the group.