the question is basically asking for the difference between how far ryan lives from the store and how far abby lives from the store.
therefore, to solve the problem, we can just do: distance ryan lives from the store minus distance abby lives from the store.
since ryan is 3.76 kilometers from the store and abby is 1.67 kilometers from the store, the answer is:
3.76 - 1.67 = 2.09 kilometers.
