The number A is 20, and (5/9) of the number B is 30. What fraction of the number A is the number B?
甲数是20，乙数的(5/9)是30，甲数是乙数的几分之几？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">30 / (5/9)</gadget>
<output>54</output>

<gadget id="calculator">20 / 54</gadget>
<output>10/27 = around 0.37037</output>

<result>10/27 = around 0.37037</result>