Answer:
40%
Explanation:
There are 5 parts to the model and 2 of them are shaded in yellow. So it is 2/5 shaded in. Now you need to turn that into a decimal so simplify divide the top by the bottom.
2/5=0.4
then multiply that by 100 to get the percentage
0.4x100=40
So it is 40% filled.