Question 1157388

A certain drug is made from only two ingredients: compound A and compound B. There are 8 milliliters of compound A used for every 5 milliliters of compound B. If a chemist wants to make 1001  milliliters of the drug, how many milliliters of compound B are needed?  
<pre>Ratio of A:B = 8:5
With total compound being 1,001 mL, amount of compound B to be mixed = {{{highlight_green(matrix(1,10, 5/(8 + 5), "*", "1,001", "=", (5/13) * "1,001", "=", (5/cross(13)) * 77cross("1,001"), "=", 385, mL))}}}