Ratio whose second term is 1.
The concept of unit rate is important, as it is sometimes necessary to convert a ratio to a unit rate when solving certain types of problems.
Example
John travelled 200 km in 4 hours. If he maintained the same speed (a constant speed), what distance did he travel per hour?
The following proportion may be written : [latex]\dfrac{200}{4}[/latex] = [latex]\dfrac{x}{1}[/latex].
This proportion may then be used to find the solution to the problem, that is : [latex]x[/latex] = 50 km.
