Suppose 3 quarts of pure antifreeze is mixed with 5 quarts of a solution that is 14% antifreeze.
a. What percentage of the resulting mixture is antifreeze?
3 * 100% = 3 quarts
5 * 14% = 0.7 quarts
3.7 quarts of antifreeze total in 8 quarts of solution
the rest is left as an exercise to the reader (in other words im too lazy to get a calculator out)
but seriously you have to be 18 to post here, dont ask 4chan about your middle school homework