A, B, C three fractions, their numerators and denominators are all natural numbers, and the ratio of the numerators is 3:2:1, the ratio of the denominators is 2:3:4, the sum of the three fractions is (29/60), Then ABC=how much.
A、B、C三个分数，它们的分子和分母都是自然数，并且分子的比是3：2：1，分母的比2：3：4，三个分数的和是(29/60)，则A-B-C=多少．
<gadget id="calculator">29 / 60</gadget>
<output>29/60 = around 0.483333</output>

<gadget id="calculator">18 - 8 - 3</gadget>
<output>7</output>

<gadget id="calculator">18 + 8 + 3</gadget>
<output>29</output>

<gadget id="calculator">7 / 29</gadget>
<output>7/29 = around 0.241379</output>

<gadget id="calculator">(29/60) * (7/29)</gadget>
<output>7/60 = around 0.116667</output>

<result>7/60 = around 0.116667</result>