A rate is often the proportion of two quantities where the second quantity is one unit of measure. Kilometres (or miles) per hour would be a [time] rate of displacement - otherwise known as speed. But there are many rates where the denominators is not time. Litres per kilometre, as a measure of fuel consumption for vehicles or miles per gallon for fuel efficiency for cars, or grams per square metres for paper are all examples of such rates. Sometimes the variable of interest is a function of several variables - one of them being time. For example, total interest is a function of the amount borrowed, the interest rate and the time. Where the context does not make it clear, the phrase "time rate" is used to define which variable is the denominator.
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Exchange rates change all the time; to get current exchange rates, go to an online currency calculator, for example, xe.com.Exchange rates change all the time; to get current exchange rates, go to an online currency calculator, for example, xe.com.Exchange rates change all the time; to get current exchange rates, go to an online currency calculator, for example, xe.com.Exchange rates change all the time; to get current exchange rates, go to an online currency calculator, for example, xe.com.
New Zealand suicide rates are probably highest during the winter.
Rates are ratios ... Speed is a rate of distance per unit of time... ratio of distance to time. Proportions are two equal ratios, whether they are rates or not.
Growth triangle
Annuity rates allow you to pay off a specific amount of money over an extended period of time. If you don't have all the money at one point, you can gradually pay it off later.