How can you determine if two ratios are equivalent?

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i

Ken leaves work 20 minutes late. he decides to make up time by taking the toll road instead of side streets. he can travel three times faster by taking the toll road. create an equation to represent his total travel time, including wait time, where x is the number of minutes the drive was expected to take