To determine the fraction of the parts that is white, we first need to find the total number of parts in the diagram.
The diagram has:
- 4 blue parts
- 3 white parts
So the total number of parts is: 4 (blue) + 3 (white) = 7 parts
Next, we find the fraction that represents the white parts. There are 3 white parts out of a total of 7 parts.
Thus, the fraction of the parts that is white is: \[ \frac{3 \text{ (white parts)}}{7 \text{ (total parts)}} = \frac{3}{7} \]
Therefore, the answer is Three-sevenths.