Answer: add 2 more yellow
Step-by-step explanation:
use the ratio 7 to 2 to solve for 35 to x
[tex]\frac{7}{2} =\frac{35}{x} \\70=7x\\x=10[/tex]
for 35 quarts of red, you will need 10 quarts of yellow to keep the ration proportional. Since it has 8 parts yellow, you need to add 2 more yellow