In this item, we are given that out of 12 ounces of ingredients comprising the milkshake, there are 4 ounces vanilla. Expressing this into fraction will give us an answer of 4/12. This fraction can be one of the answers. Since we are asked for two fractions, we can simplify 4/12 such that we get an equivalent fraction that is equal to 2/6. Hence, the answers to this question are 4/12 and 2/6.
The answer is 4/12 because there are 12 ounces and 4 of those ounces are vanilla because of that it is saying 4 out of those 12 ounces are vanilla ( sorry I am bad at explaining)