A unit fraction is a fraction in which the numerator (the top number) is always 1, and the denominator (the bottom number) is a positive whole number greater than 1.
For example, 1/2, 1/3, and 1/4 are all unit fractions. Unit fractions represent equal parts of a whole and are often used to divide objects or quantities into equal shares.
They are fundamental in understanding fraction concepts and are a building block for more complex fractions and mathematical operations involving fractions.