其它
Hannah bought $$5$$ whole pizzas: $$1$$ for herself and $$1$$ for each of her $$4$$ students.  Hannah sliced her pizza into $$5$$ equal parts and ate only $$3$$ slices.  Student $$A$$ sliced his pizza into $$4$$ equal parts, but ate only $$3$$ slices.  Student $$B$$ sliced his pizza into $$8$$ equal parts, but ate only $$7$$ slices.  Student $$C$$ sliced her pizza into $$3$$ equal parts, but ate only $$2$$ slices.  Student $$D$$ sliced her pizza into $$6$$ equal parts, but ate only $$3$$ slices.  Who ate less pizza than Hannah? 
Overseas Competition->Knowledge Point->Calculation Modules->Fractions
All of them eat more than $$\frac{1}{2}$$, except student $$D$$. 