Answer:
4 parts white
Explanation:
We can set up a ratio and then use cross multiply to solve;
![(12)/(16) =(3)/(x)](https://img.qammunity.org/2023/formulas/mathematics/high-school/oa59dhrmhpzbktl38v5k94r53hdemi0nzw.png)
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