If we have equal amounts of each mixture, then the percent of cream is 9%.
To see this, let's suppose that we mix x amount of 18% cream with x amount of 2% milk.
Then the amount of cream contained in the final mixture is just .18x, And the total amount of both mixtures is 2x.
So..... (.18x) / (2x) = .09 or 9%.
If you have equal amounts of each, you would end with 10%, but if you have more of one than the other, the percentage gets closer to the percentage of the larger amount.
If you have x quarts of 18% and y quarts of 2%, then use this formula: [.18x + .02y] / [x + y]
If we have equal amounts of each mixture, then the percent of cream is 9%.
To see this, let's suppose that we mix x amount of 18% cream with x amount of 2% milk.
Then the amount of cream contained in the final mixture is just .18x, And the total amount of both mixtures is 2x.
So..... (.18x) / (2x) = .09 or 9%.