How do you write 7 a mixed number in the simplest form

A mixed number is any expression that combines a whole number equal to or greater than 1, plus a fractional reminder. For example, 1 5/8 and 3 2/3 are both mixed numbers. Usually, a mixed number is the simplest way to express an improper fraction, in which the numerator or top number is bigger than the denominator, or bottom number. But you still have to pay attention to the fractional remainder part of the mixed number. If it's an improper fraction itself, or if it's not expressed in lowest terms, you can simplify the entire mixed number.:

hopefully this makes you understand more.

What does this even mean?