Lusia ran 3 2/3 kilometers in 1/3 of an hour. If speed is distance over time, calculate lusia's speed.

In the question, they give you the formula for speed ...

speed = distance / time

They also give you the distance and the time, so all we have to do is stick them into the equation ...

speed = 3 2/3 Km / 1/3 hour

speed = 3 2/3 / 1/3

To divide the fractions, first we need to convert 3 2/3 into an improper fraction

3 2/3 = 11/3

now we multiply 11/3 x the reciprocal of the divisor 1/3. The reciprocal just means flip the numerator and denominator

speed = 11/3 x 3/1

speed = 33/3

speed = 11 Km/hour