A researcher asked a group of 400 students about what types of pets they preferred. She recorded the results in the following pie chart. What is the ratio of the number of dogs to cats to rabbits that the students prefer? Simplify your answer as much as possible.

The GED Mathematical Reasoning test measures your algebraic and quantitative problem-solving skills and requires you to demonstrate an understanding of mathematical concepts, the skill to use those concepts, and the ability to apply knowledge in real-world scenarios.