Among the fractions (27/72), (17/51), (42/97), what is the simplest fraction?
在分数(27/72)、(17/51)、(42/97)中，最简分数是多少．
<gadget id="calculator">42 / 97</gadget>
<output>42/97 = around 0.43299</output>

<result>42/97 = around 0.43299</result>