Rate

A rate is a ratio that compares two quantities expressed in different kinds of units.

Examples

  1. 3 pens cost $1.19. Items (pens) are one kind of unit and money ($1.19) is another.
  2. A jet may travel at the rate of 1,000 miles per hour. Distance (miles) is one kind of unit and time (hour) is another.
  3. The speed of light in space is 186,000 miles per second. Distance (miles) is one kind of unit and time (second) is another.
  4. The rate of interest on a loan for a new car was advertised as 5.9% per year. This is a complex kind of rate. It comares a rate (percent, or parts per hundred) with another kind of unit, time (year).

See also interest, unit price.