Among the fractions (11/20), (9/25), (9/14), (12/15), how many fractions cannot be reduced to finite decimals?
在分数(11/20)、(9/25)、(9/14)、(12/15)中，不能化成有限小数的是多少．
<gadget id="calculator">9 / 14</gadget>
<output>9/14 = around 0.642857</output>

<result>9/14 = around 0.642857</result>