42/75 = 56%
A value like 56% can show up in everyday life as a test score, a survey result, or the amount of a phone battery that remains. It tells you that a little more than half of the whole is included.
To picture it quickly, imagine a bar split into 100 equal parts, with 56 shaded. You can also think of it as just over halfway, since 50% is half.
One common mistake is treating 56% as exactly half; it is 6 percentage points more. Also, a percentage describes part of a whole, so it helps to know what that whole is.