Answer:
Half
Explanation:
I think you're missing the number of hours in the question: "Lori ran 2 miles in ? hours"
Anyways:
Lori's speed is distance/time: v = 2 miles / ? hours
Calculate time from speed (time = distance / speed): t = 1 mile / (2 miles / ? hours)
To divide with a partial you can multiply with reciprocal, thus: t = 1 mile x (? / 2 miles)
Simplified: t = (1 / 2) x ? hours
And it makes sense: with the same speed, half the distance takes half the time :)