(2/5) of Xiaogang’s monthly income is used to pay for living expenses, (1/6) is used to pay for study expenses, and (3/10) is used to pay for housing loans. These three expenditures account for a fraction of the monthly income How much?
小刚家月收入的(2/5)用来支付生活费用，(1/6)用来支付学习费用，(3/10)用来支付购房贷款，这三项支出一共占月收入的几分之几？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(2/5) + (1/6) + (3/10)</gadget>
<output>13/15 = around 0.866667</output>

<result>13/15 = around 0.866667</result>