Rates are the numbers that compare two different quantities of different units. For example, miles per hour. Here, the word ‘per’ shows that we are dealing with rates. Generally, it is expressed using the ‘/’ symbol. Similarly, the ratio between two different quantities with the second term as ‘1’ is referred to as ‘unit rates’. For example, in one hour, there are 60 minutes. In unit rates, it can be written as 60 minutes per hour.

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