Arithmetic Course/Types of Number/Fraction Number

Fraction Number

Number has the general form of a Numerator over a Denominator

$\frac{A}{B}$

Equal Fraction

$\frac{A}{B}=\frac{C}{D}$ when A = C and B = D

Common Denominator

$\frac{A}{B}(\frac{D}{D})=\frac{C}{D}(\frac{B}{B})$

$\frac{AD}{BD}=\frac{BC}{BD}$

Mathematic operation

Addition

$\frac{A}{B}+\frac{C}{D}=\frac{AD+BC}{BD}$

Subtraction

$\frac{A}{B}-\frac{C}{D}=\frac{AD-BC}{BD}$

Multiplication

$\frac{A}{B}\times \frac{C}{D}=\frac{AC}{BD}$

Division

$\frac{A}{B}/\frac{C}{D}=\frac{AD}{BC}$

Rational Number

Fraction can be expressed as Rational Number

$\frac{1}{4}=0.25$

Irrational Number

Fraction can be expressed as Irrational Number

$\frac{1}{3}=0.333333....$

Irratioal Constants

$\pi =3.1415...$

$e=2.72...$