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?
In 64 fluid ounces, there are 64/8=
<gadget id="calculator">64/8</gadget>
<output>8</output>
8 eight-ounce servings.
Using 16-ounce servings, Simeon now drinks 64 ounces in 64/16=
<gadget id="calculator">64/16</gadget>
<output>4</output>
4 servings.
Thus, Simeon now drinks his water in 8-4=
<gadget id="calculator">8-4</gadget>
<output>4</output>
4 fewer servings per day.

<result>4</result>