Answer:

Step-by-step explanation:
we know that
When we compare positive fractions with the same numerator, the largest rational number will be the fraction with the lowest denominator
In this problem we have
and 
Both numerator are equal
Compare the denominators

therefore
is the largest rational number
2.)a 3.)b 4.)a 5.)a
............
Answer:
A
Step-by-step explanation:
You only have to pay the $50 one time and then you add the $15 and multiply it by however many months you choose to do.
B, more than 163... add 164 (simply because it is over 163) and add it to 237 and you get 401, which is more than 400