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maddieh728
for mia and ethan they actually have the same ratio if you do 21/3 and then 28/4 they both have the same ratio: 7
For Olivia and Jacob, if we make it so each ratio has 15 girls, we can see that Jacobs class has a 12:15 boy-girl ratio while Olivia only has a 9:15 boy-girl ratio. This means that Jacob has a higher boy to girl ratio.