Today, Tiantian Fruit and Vegetables shipped a total of 50kg of mangoes and pineapples, of which 20kg were mangoes. How much did the kilograms of pineapples account for in the total number of fruits shipped?
今天甜甜果蔬行运进芒果和菠萝两种水果共50千克，其中芒果20千克，运进菠萝的千克数占运进水果总数的多少．
<gadget id="calculator">50 - 20</gadget>
<output>30</output>

<gadget id="calculator">30 / 50</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>