How many two thirds ounce can be made with 8ounces

First, you would need to create an equation for this problem. 
8 ÷

Next, since you are dividing, you would flip the second fraction and change the equation to multiplication. 
× 

Now, all you have to do is simplify and solve it. 
× 
 × = = 12

12 two thirds of an ounce can be made with 8 ounces. 

I hope this helps!

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.