idk how to solve this and i want to know where 3/4 and 1/4 came from!?

Dividing Partnership Income Nicole Murphy and Ashley Drake formed a partnership, investing $270,000 and $90,000, respectively. Net income for the current year is $350,000. (b) Divided in the ratio of original capital a Net income investment b. Net income Murphy $175.000 $262.500 279 or 31 $350.000 3 Drake $175,000 $ 87,500 $350,000 Total $350,000 $350,000