There were 50 people in total on June 6, and 40 people participated in the tree planting activities on Arbor Day. How many people planted trees accounted for the whole class.
六一共有50人，参加植树节植树活动的有40人，植树的人数占全班人数的多少．
<gadget id="calculator">40 / 50</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>