Answer:
 Fraction 

Explanation:
 Given : At memorial hospital 9 of the 12 babies born on Tuesday were boys
To find :  What fraction of the babies born on Tuesday were boys
Solution : As we know total number of babies born in memorial hospital = 12 
Out of 12 babies number of boys born on Tuesday = 9 
So the fraction of babies born on Tuesday were boys 



Therefore, The fraction or simplest form of fraction 
