Mathematics is full of little tricks that make calculations and problem solving easier for us. A very important trick when working with fractions is that all integers can be written as fractions by dividing the integer by 1. You already know that a number divided by 1 is the number itself.
Any number becomes a fraction when you divide it by 1.
Note! A fraction is reduced when the numerator and denominator no longer have any common factors (factor 1 does not apply in this context).