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 24 liters of Fuchsia to change it to Mauve paint?  Choose the most appropriate option
A) 9 B) 12 C) 15 D) 16 E) 18
in 24 liters, Red = 5/8 * 24= 
<gadget id="calculator">5/8 * 24</gadget>
<output>15</output>
15 and Blue= 9   so, 15/(9+x) = 3/5   or, x = 16 (Answer 16)
<result>D</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 24 liters of Fuchsia to change it to Mauve paint?