In this case, we must figure out what 1/5 of $180 is. To solve this, you must divide 180 by 5. 180 / 5 = 36. However, the fraction amount of what she wants to save is 3/5. This means we multiply 36 by 3. 36 x 3 = 108. This means she will save $108 and spend $72 dollars.
