The fruit shop brings in peaches, apples and pears (9/8) tons in total, of which peaches account for (1/5) of the total weight, apples account for (1/2) of the total weight, and pears account for the total weight of the three fruits What fraction of?
水果店运进桃子、苹果、梨三种水果共(9/8)吨，其中桃子占总重量的(1/5)，苹果占总重量的(1/2)，梨占三种水果总重量的几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/5) - (1/2)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>