Freddie is searching for a shirt and discovers that he has 12 shirts for every 6 pair of jeans if he has 18 shirts how many pairs of jeans does he have

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?