Lorraine made a pan of brownies and cut them into 16 pieces.  Her children ate 25% of the brownies when they got home from school.  After dinner,  the entire family ate 50% of the remaining brownies.  After everyone went to bed, Lorraine ate 1 more brownie.  How many brownies are left over?
Her children ate 25% of the 16 brownies so they ate .25*16 = 
<gadget id="calculator">25*.01*16</gadget>
<output>4</output>
4 slices.
There were 16 brownies and the children ate 4 slices, leaving 16-4 = 
<gadget id="calculator">16-4</gadget>
<output>12</output>
12 brownies.
The family ate 50% of the remaining 12 brownies so they ate .50*12 = 
<gadget id="calculator">50*.01*12</gadget>
<output>6</output>
6 brownies.
There were 12 brownies and they ate 6 which leaves 12-6 = 
<gadget id="calculator">12-6</gadget>
<output>6</output>
6 brownies.
Lorraine had 1 more of the 6 remaining brownies which leaves 6-1 = 
<gadget id="calculator">6-1</gadget>
<output>5</output>
5 brownies.

<result>5</result>