11/10 is closer because 7/8 is 1/8 from 1 and 11/10 is 1/10 from 1. Through simple calculations, 1/10 < 1/8.
1/10 * 10 = 1
1/8 * 10 = 10/8 = 5/4 = 1 1/4
We can see that 1/8 is 25 percent larger than 1/10
Therefore, 1/10 < 1/8
Since the difference is smaller for 11/10, 11/10 is closer to 1.