The average of the three fractions is (1/5), two of which are (1/3) and (1/4), and what is the other fraction.
三个分数的平均数是(1/5)，其中两个分数是(1/3)和(1/4)，还有一个分数是多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 3</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) + (1/4)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">(3/5) - (7/12)</gadget>
<output>1/60 = around 0.016667</output>

<result>1/60 = around 0.016667</result>