1. The problem is to find the internal ratio of the parts 2 : 3 : 5. 2. The internal ratio means dividing a whole into parts proportional to 2, 3, and 5. 3. The total parts are $2 + 3 + 5 = 10$. 4. Each part is a fraction of the whole: first part $= \frac{2}{10} = 0.2$, second part $= \frac{3}{10} = 0.3$, third part $= \frac{5}{10} = 0.5$. 5. So the internal ratio 2 : 3 : 5 corresponds to fractions 0.2, 0.3, and 0.5 of the total. Final answer: The internal ratio 2 : 3 : 5 divides the whole into parts 0.2, 0.3, and 0.5 respectively.