Among the expenditures of small famous families in September, the rent accounted for about (1/7) of the total expenditure, and the expenditure for catering accounted for about (1/3) of the total expenditure. These two expenditures accounted for about a fraction of the total expenditure ?
小名家9月份的支出中，房租约占总支出的(1/7)，用于餐饮方面的支出约占总支出的(1/3)，这两项支出约占总支出的几分之几？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/7) + (1/3)</gadget>
<output>10/21 = around 0.47619</output>

<result>10/21 = around 0.47619</result>