Amallard duck flies 5 6 of a mile in 1 60 of a hour. compute the unit rate by setting up a complex fraction and simplifying.

Important:  Please express fractions properly:  use the " / " symbol to represent division.  Your question should read:

"A Mallard duck flies 5/6 of a mile in 1/60 of a hour.  Find the rate (speed) at which it flies."

To do this, divide the distance flown by the elapsed time:
                                    5
5/6   mile                  
  =  6 miles / hr
1/60   hour 
                                        1
                                       
                                         60

to divide 5/6 by 1/60,  write    5/6 and multiply that by the reciprocal of 1/60. 

In other words,   write    5/6, invert (1/60) and then multiply.

This comes out to                    (5)(60)
                                                 mph
                                                  (6)(1)

Do not multiply here.  Instead, reduce 60/6 to 10/1.

Can you now write out the final answer, in mph?  (miles per hour)