Ratio
The ratio of two numbers 
and 
is written 
, where is the Numerator and is the Denominator.The ratio of to is equivalent to the Quotient . Betting Odds written as 
correspond to
. A number which can be expressed as a ratio of Integers is called a Rational Number.
- Unit
- Unital
- Unitary Aliquot Sequence
- Unitary Amicable Pair
- Unitary Divisor
- Unitary Group
- Unitary Matrix
- Unitary Multiperfect Number
- Unitary Multiplicative Character
- Unitary Perfect Number
- Unitary Sociable Numbers
- Unitary Transformation
- Unitary Unimodular Group
- Unit Circle
- Unit Disk
- Unit Fraction
- Unit Matrix
- Unit Point
- Unit Ring
- Unit Sphere
- Unit Square
- Unit Step
- Unit Vector
- Unity
- Univalent Function