Answer:
It's Emily's class. They have 20 students while Santiago's class has 18.
Explanation:
75%=0.75=3/4. If 3/4=15, then 1/4 =15/3=5. So 4/4=5x4=20.
2/3=12. 1/3=12/2=6. 3/3=6x3=18.
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