Master Li used a truck to transport a batch of goods weighing (9/10) tons. On the first day, (1/5) of this batch of goods was transported, and on the second day (3/8) of this batch of goods, and the rest What fraction of this shipment?
李师傅用货车运送一批重(9/10)吨的货物，第一天运了这批货物的(1/5)，第二天运了这批货物的(3/8)，还剩下这批货物的几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (1/5) - (3/8)</gadget>
<output>17/40 = around 0.425</output>

<result>17/40 = around 0.425</result>