Answer:
B.80
Step-by-step explanation:
a straight line adds up to 180 degrees. you already have 100. 180-100=80
The quotient of two fraction is the multiplication between the first and the inverse of the second:

So, in your case, you have

So, the question now is: which is larger, 7/10 or 3/5? To answer this question, transform the second fraction so that it will have denominator 10 as well:

So, now it is clear that

I think that the answer is 25
A median i am 100% sure and i am in 11th grade so I can’t be wrong ;)