Is 7/8 or 11/10 closer to 1? how did you decide?

11/10 is closer to 1. 
To solve for this, give them common denominators. Lets make it 80 for this one.
To get 80, you multiply 8 by 10, so you have to do the same to the number on top. This gives you 70/80.
To get 80 for the second fraction, you multiply by 8 and get 88/80.
Now lets take the numbers on top and subtract them from 80. 
88 - 80 = 8
80 - 70 = 10
8 is less than 10, and so 11/10 is closer.