Marco drove 75 miles in 1 2/3 hours. how many miles ca he drive in 1 hour?

45 miles

Explanation:

The distance driven is directly proportional to the time:

distance / time = K

Which can also be written as:

distance₁ / time₁ = distance₂ / time₂

Here you have:

distance₁ = 75 miles time₁ = 1 + 2/3 hours = (3 + 2) / 3 hours = 5/3 hours distance₂ = x time₂ = 1 hour

With that you can set up a proportion:

75 miles / (5/3) hour = x₂ / 1 hour

Solving for x₂ you get:

x₂ = [75 miles] * 1 hour / (5/3 hour) = 3 * 75 / 5 miles = 45 miles