The quotient of 5/31 divided by 15/23, reduced to the lowest fraction, is
a. 93/23 or 4 1/23.
b. 75/373.
c. 115/465.
d. 23/93.

When you want to get the quotient of two fractions you would cross multiply them.
(5/31)/(15/23) would become ((5x23)/(31x15))= (465/115) you could then simpy the top and bottom by 5 ending up with (93/23) you can simply that into a mixed fraction by dividing 23 into 93 is 4 times with 92 so the whole number is 4 and 93-92 = 1. so the numerator of the fraction is 1 and 93 remains the denominator. so the answer could also be 4(1/93).

When i did the math i got 11 cm