Nikka has a 100 stamp collection. Thirty-five percent of her stamps are Chinese, 20% are US stamps, and the rest are Japanese stamps. How many Japanese stamps does Nikka have?
Nikka has 100 x 35/100 = 
<gadget id="calculator">100*35/100</gadget>
<output>35</output>
35 Chinese stamps.
She has 100 x 20/100 = 
<gadget id="calculator">100*20/100</gadget>
<output>20</output>
20 US stamps.
So, Nikka has 35 + 20 = 
<gadget id="calculator">35+20</gadget>
<output>55</output>
55 stamps that are not Japanese.
Thus, Nikka has 100 - 55 = 
<gadget id="calculator">100-55</gadget>
<output>45</output>
45 Japanese stamps.

<result>45</result>