Question

Isabelle is mixing red paint with blue paint to make purple paint. She adds of a fluid ounce 3/10 of red to 11/15 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple. How many fluid ounces of red paint will she need to make 3 fluid ounces of purple paint?

If you will tell me how to do this and show me what you did??

Answer 1

Set up a proportion.
Red1/purple1 = Red2/purple2

Red1 = X
purple1 = 3
Red2 = 3/10
purple2 = 31/30

$\frac{x}{3} = \frac{(3/10)}{(31/30)} \\ \\ \frac{x}{3} = \frac{3}{10}*\frac{30}{31} = \frac{9}{31} \\ \\ x = \frac{9}{31}*3 = \frac{27}{31}$

Answer 2

Answer:

27/31

Step-by-step explanation: