When jeremy gets his allowance he agrees to save part of it his savings and expenses are in the ratio of 7: 5 if his daily allowance is $3,find how much he saves each day?

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?