- Rate (mathematics)
A

**rate**is a special kind ofratio , indicating a relationship between twomeasurement s. A rate may be defined using two numbers of the same units resulting in adimensionless quantity (for example, "1 in 10 people"), or may be defined by two different measurements with different units (for example, "metres per second" used inspeed ).Often rate is a synonym of

rhythm orfrequency , a count persecond . Examples areheart rate orsample rate .**Example**When dealing with rates, the division operator is sometimes expressed as "per". If the units are expressed without abbreviation, the bottom unit is singular. If one travels 5 meters in 2 seconds, the following rate is:

:$frac\{5\; mathrm\{meters\{2\; mathrm\{seconds\; =\; frac\{5\}\{2\}\; mathrm\{meters\; per\; second\}\; =\; 2.5\; mathrm\{meters\; per\; second\}$

**Unit rate**A

**unit rate**is a rate that issimplified so it has a denominator of 1. This type of rate is frequently used when referring tostatistics .fact|date=October 2007**ee also***Rate of change in calculus / marginal rate

*Reaction rate in chemistry

*Rate of reinforcement in behaviorism

*Bit rate in computing

*Rate of return in finance

*Effective interest rate in finance

*Yield in finance

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