Sean and Sierra invited 200 guests to their wedding.  If 83% of the guests RSVP with a Yes response and 9% of the guests RSVP with a No response, how many guests did not respond at all?
Yes RSVP responses are 200 x 83% = 
<gadget id="calculator">200*83*.01</gadget>
<output>166</output>
166 guests.
No RSVP responses are 200 x 9% = 
<gadget id="calculator">200*9*.01</gadget>
<output>18</output>
18 guests.
Guests who responded are 166 + 18 = 
<gadget id="calculator">166+18</gadget>
<output>184</output>
184.
Guests who did not respond at all are 200 - 184 = 
<gadget id="calculator">200-184</gadget>
<output>16</output>
16.

<result>16</result>