A vegetable field has 5 hectares. (1/5) grows green vegetables, (4/15) grows spinach, and the rest grows radishes. What percentage of the land grows radishes?
一块菜地，有5公顷，它的(1/5)种青菜，(4/15)种菠菜，其余种萝卜，种萝卜的占这块地的几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1 - (1/5) - (4/15)</gadget>
<output>8/15 = around 0.533333</output>

<result>8/15 = around 0.533333</result>