Simeon drinks 64 fluid ounces of filtered water every day.  He used to drink this water in 8-ounce-servings.  But now, he drinks his water in 16-ounce servings.  How many fewer servings per day does it now take Simeon to drink his water than it used to? Let's think step by step and output the final answer after "####".
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In 64 fluid ounces, there are 64/8=<<64/8=8>>8 eight-ounce servings.
Using 16-ounce servings, Simeon now drinks 64 ounces in 64/16=<<64/16=4>>4 servings.
Thus, Simeon now drinks his water in 8-4=<<8-4=4>>4 fewer servings per day.
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Simeon drinks 64 fluid ounces of filtered water every day.  He used to drink this water in 8-ounce-servings.  But now, he drinks his water in 16-ounce servings.  How many fewer servings per day does it now take Simeon to drink his water than it used to?
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