At Deluxe paint store, Fuchsia paint is made by mixing 5 parts of red paint with 3 parts of blue paint. Mauve paint is made by mixing 3 parts of red paint with 5 parts blue paint. How many liters of blue paint must be added to 40 liters of Fuchsia to change it to Mauve paint? Pick one: A) 9 B) 12 C) 15 D) 16 E) 26.6
in 40 liters, Red = 5/8 * 40= 
<gadget id="calculator">5/8 * 40</gadget>
<output>25</output>
25 and Blue= 15   so, 25/(15+x) = 3/5   or, x = 26.6 (Answer 26.6)
<result>E</result>
At Deluxe paint store, Fuchsia paint is made by mixing 5 parts of red paint with 3 parts of blue paint. Mauve paint is made by mixing 3 parts of red paint with 5 parts blue paint. How many liters of blue paint must be added to 40 liters of Fuchsia to change it to Mauve paint?