To find the proper ratio that describes the relationship between the number of red blocks and green blocks for each group, we can simplify the numbers.
First Group:
- Red Blocks: 15
- Green Blocks: 45
To simplify this ratio, we can express it as:
\[ \text{Ratio of Red to Green for Group 1} = \frac{15}{45} = \frac{1}{3} \]
Second Group:
- Red Blocks: 30
- Green Blocks: 90
Similarly, we simplify this ratio:
\[ \text{Ratio of Red to Green for Group 2} = \frac{30}{90} = \frac{1}{3} \]
Conclusion: Both groups have the same ratio of red blocks to green blocks, which is \(1:3\). This means that for every 1 red block, there are 3 green blocks in each group.