So since there is only 5 ticks in between 1 and 2. Instead of going to 1,2,3,4,5,6,7,8,9,10. We go by 2's. 2,4,6,8,10.
In the graph we see on the block dot it equals: 1.4
So in the equations below all we are going to do is solve them and see if it matches 1.3 to 1.4 (we are looking for a decimal in the equations).
Answer: Go with the 5/6 + 3/6 because in decimal form it is 1.3 repeating.