There are 15 pear trees and 20 apple trees in the orchard of the school. What fraction of a pear tree is an apple tree?
学校的果园里有梨树15棵，苹果树20棵，梨树的棵树是苹果树的几分之几？
<gadget id="calculator">15 / 20</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>