By hand you can write every integer you wish as a fraction with denominator 1. 4=4/1, 13=13/1. You can even generate all the equivalent fractions of any integer, for example -4=(-8/2)=8/(-2)=-8/2=-12/3=...
However, simple calculators are designed with a feature called automatic simplification. That is why ever result that is a fraction that is equivalent to an integer is written as that integer. Fractions are reduced to their simplest form. Call it a design flaw if you want but that is how it is.
m represents equal parts, where n equal parts of that size make up one whole. Two different fractions may correspond to the same rational number; for example 1⁄2 and 2⁄4 are equal, that is:
If the absolute value of m is greater than n, then the absolute value of the fraction is greater than 1. Fractions can be greater than, less than, or equal to 1 and can also be positive, negative, or zero. The set of all rational numbers includes the integers, since every integer can be written as a fraction with denominator 1. For example −7 can be written −7⁄1. The symbol for the rational numbers is Q (for quotient), also written 
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