Leah has two same size rectangles divided into the same number of equal parts. one rectangle has 1/3 of the parts shaded, and the other has 2/5 of the parts shaded. what is the least number of parts into which both rectangles could be divided?

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years