Well if you had 4 ounces of vanilla and the total milkshake was 12 then 12 would become the denominator and the 4 is what part of the milkshake is so 4 is the numerator and that would make it 4/12 and then you can simplify 4/12 and it would = 2/6
The total amount is 12 ounces therefore you can use that as your denominator. 4 ounces out of it are vanilla and the other 8 are chocolate. 4 out of 12 is vanilla . This can also be written as 4/12. 4/12 can be your first fraction. The second one can be a simplified version of 4/12. The simplified version would be 1/3. Your two fractions would be 4/12 and 1/3.
![\frac{ L_1^{3} }{ L_2^{3} } = \frac{V_1}{V_2} \\ \\ ratio = \frac{L_1}{L_2} = \frac{\sqrt[3]{V_1} }{\sqrt[3]{V_2} }](https://tex.z-dn.net/?f=%5Cfrac%7B%20L_1%5E%7B3%7D%20%7D%7B%20L_2%5E%7B3%7D%20%7D%20%3D%20%20%5Cfrac%7BV_1%7D%7BV_2%7D%20%20%5C%5C%20%20%5C%5C%20ratio%20%3D%20%20%5Cfrac%7BL_1%7D%7BL_2%7D%20%3D%20%20%20%5Cfrac%7B%5Csqrt%5B3%5D%7BV_1%7D%20%7D%7B%5Csqrt%5B3%5D%7BV_2%7D%20%7D%20)