18 pounds of flour is $10. How much is one pound of flour?

##5/9$##

Each pound will cost a value so that if the value was multiplied by ##18## it will give us ##10$## . We don't know the value of the pound so let's call it ##x##.

##18x=10$##

Divide both sides by ##18##

##(cancel(18)x)/cancel18=(10$)/18##

##x=10/18$##

##10/18$## is our answer

But we can simplify it by dividing both the numerator and the denominator by the highest common factor ##2##

##(10-:2)/(18-:2)=5/9$##

Our final answer is ##5/9$##