Answer:
Martin got the highest score.
Explanation:
To figure this out, let's find out who got the most questions correct (which correlates with the highest score)
Martin = 25 correct
Katie = (two-thirds or 66.66%) of 30 correct
Jeff = (66% of 30 correct)
Megan = (18% of 30 correct)
To solve for amount of correct answers for each unknown student, multiply the amount of questions total by the amount they each got right (as a decimal)
Katie = 30*0.6666 = 19.998 (rounds up to 20 correct)
Jeff = 30*0.6 = 18 correct
Megan = 30*0.18 = 5.4 (rounds down to 5 correct)
Because Martin had the most correct answers out of everyone at 25 correct, he got the highest score.