Unit means one.
The fractions with numerator is one and the denominator is any positive integer. Such fractions are called unit fractions.
It is also defined as the reciprocal of the any positive integers.
Example of the unit fractions are
[tex]\frac{1}{2}, \frac{1}{10}, \frac{1}{50}, \frac{1}{100}, . . .[/tex]
The fraction with numerator is any number other one is called
the non-unit fractions.
Example of the non-unit fractions are
[tex]\frac{2}{3}, \frac{3}{7}, \frac{8}{50}, \frac{9}{10}, . . .[/tex]