Might have to zoom in but need answer ASAP!!! Which sentence suggests the authors purpose for writing the passage?

steps:

1. do 28-12= 16 girls

2. your ratio is 12: 16

3. your answer is b. 3/4

4. this correct because

12 divided by 4 is 3

16 divided by 4 is 4

5. your answer is 3/4

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