A library contains 67,982 books. The children's section represents 1/3 of the total books. Of the remaining books, 75% are fiction. How many books are in the non-fiction section?

Find the least common divisor of 10 and 5, which is 10 and use it to carry out subtraction of fractions as follows

\(\frac{9}{10}-\frac{2}{5}=\frac{9\left(1\right)-2\left(2\right)}{10}=\frac{9-4}{10}=\frac{5}{10}=\frac{1}{2}\)

The number of packets of a balloon to purchase is evaluated as follows

\(16\ children\ast\frac{15 balloons}{1 child}\ast\frac{1 packet}{50 balloons}=\frac{24}{5}=4.8 packets\)

Approximating 4.8 to 5, the mother will have to buy 5 packets of balloons.

Use the relation 1 gallon =128 ounce to change 3 gallons to ounces as follows

\(\frac {3\ gallons \ast 128 ounces}{ 1 gallon}=384 ounces\)Thus, 3 gallons is equal to 384 oz.

Since the time of comparison is 24 hours in both cases, the number of chickens is determined using the following relation

\(\frac{24\ eggs\ast2 chickens}{6 eggs}=8 chickens\)It will take24\ eggs\ast2 chickens6 eggs=8 chickens 24 hours to lay 24 eggs