If m and n are positive two-digit numbers, then, of the following fractions, the one with the largest value is:
a. n/m
b. n+1/m-1
c. n-1/m
d. n/m+1

Jordan rides his bike 6 7/15 miles every day to deliver newspapers and to go to and from school. if his ride to and from school is 4 3/10 miles, how many miles is the trip to deliver newspapers? 1 1/3 1 1/6 2 1/6 2 4/5

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

How do you use the elimination method for this question? explain, because i really want to understand!