PLS HELP ASAP THANKS ILL GIVE BRAINLKEST PLS THANKS PLS ASAP

Answer:
4 parts white
Step-by-step explanation:
We can set up a ratio and then use cross multiply to solve;
[tex]\frac{12}{16} =\frac{3}{x}[/tex]
12x = 48
x = 4 parts white
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather