if each call she makes takes 1/16 of an hour , how many calls can she make in 1/2 hour ,? simplify the fraction ?

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

5/8 beds for each square yard