Xiaojun collected 15 insect specimens, 7 of which were butterfly specimens. What fraction of the number of butterfly specimens is the total number of insect specimens?
小军采集了15个昆虫标本，其中7个是蝴蝶标本．蝴蝶标本的个数是昆虫标本总数的几分之几？
<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<result>7/15 = around 0.466667</result>