Ratio

In algebra, a ratio is the relationship between two quantities. It is expressed as the quotient of two numbers, or as two numbers separated by a colon (pronounced "to"). A number that can be written as a ratio of two integers is a rational number. In physics, a ratio between two magnitudes of the same type of quantity gives a positive real number when the magnitudes are expressed relative to an absolute or natural zero. The ratio between a difference of two magnitudes to a third magnitude, such as a unit, gives a real number (i.e. positive or negative).

See also

• Analogy
• Conversion factor
• Financial ratio
• Golden ratio
• Odds
• Proportionality
• Ratio decidendi — the reasoning for a court of law's decision
• Rational number