Ratio of dollar to book is fraction of both
[tex]\frac{18}{6\text{ }}\text{ = }\frac{3}{1}\text{ = 3 : 1 }[/tex]Ratio of dollar to book is therefore ratio 3 to 1 ( 3 : 1 )
Then ratio of 9 minutes to 8 miles is ...
[tex]\frac{9}{8}\text{ = 9 : 8 }[/tex]The ratio of minutes to mile is 9 : 8 ( 9 is to 8 )