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).

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.