What is the fraction in (3/8), (9/10), (13/15) and (3/16) that cannot be reduced to a finite decimal.
在(3/8)、(9/10)、(13/15)和(3/16)中不能化成有限小数的分数是多少．
<gadget id="calculator">13 / 15</gadget>
<output>13/15 = around 0.866667</output>

<result>13/15 = around 0.866667</result>