A (2/3) hectare vegetable field, of which green vegetables account for (1/3) and cucumbers account for (1/5). For the remaining tomatoes, what percentage of the vegetable field does the tomato occupy?
一块(2/3)公顷的菜地，其中青菜占菜地的(1/3)，黄瓜占菜地的(1/5)．剩下的种西红柿，西红柿占菜地的几分之几？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/3) - (1/5)</gadget>
<output>7/15 = around 0.466667</output>

<result>7/15 = around 0.466667</result>