In September, 60% of students in a class knew their multiplication facts. By December, 70% of students knew them. | Cheap Nursing Papers
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In September, 60% of students in a class knew their multiplication facts. By December, 70% of students knew them.

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In September, 60% of students in a class knew their multiplication facts. By December, 70% of students knew them. Assuming that students do not forget what they learned, what percentage of the students who did not know their facts in September learned them by December?

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