The goods weighed 150 tons, and 30 tons were used. What fraction of the total was used?
货物重150吨，用去了30吨，用去的是总数的几分之几？
<gadget id="calculator">30 / 150</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>