PLEASEEE HELP ASAP!! it’s a easy question i just cant wrap my head around it *GRADE 9 WORK*

How do you divide 9/4 divided by 10/3

Given the points a(-2, 1) and b(8, 6), find the coordinates of the point c on directed line segment ab, that partitions ab in the ration 2: 3.

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250