<h1>Rational Numbers</h1>
<ul>
<li>A number that can be expressed as a fraction <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mfrac><mi>p</mi><mi>q</mi></mfrac></mrow><annotation encoding="application/x-tex">\frac{p}{q}</annotation></semantics></math>qp​ where <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>q</mi><mo mathvariant="normal">≠</mo><mn>0</mn></mrow><annotation encoding="application/x-tex">q \neq 0</annotation></semantics></math>q=0</li>
<li>All <a href="/second-brain/integers">integers</a> are rational numbers</li>
<li>Denoted by ℚ</li>
</ul>
<a href="/second-brain/math">Math</a> <a href="/second-brain/number-theory">Number Theory</a>