Answer: 7:3, 7 and 3, or 7/3 depending how you write it, but it’s the same.
Explanation: When doing ratios, all you do is get both numbers and put them in the order they ask for.
Example: Bob has 4 heart cupcakes. Lisa has 9 butterfly cupcakes. What is the ratio of butterfly cupcakes to heart cupcakes?
The answer to that would be 9:4. You just follow the order the question asks.