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This time let's multiply 3/4 X 2/5. That means take 3/4 of 2/5. So let's first draw 2/5.
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Red is 2/5 of the square.
Yellow is 3/4 of 2/5.
That means
Yellow is 6/20 . . .
or 3/10 of the whole square.
Let's show the multiplication again.
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lanius@math.rice.edu