Obviously, during shooting practice, 15 balls were hit, and 15 balls were missed. What is the shooting percentage?
明明进行投篮练习，投中了15个球，没投中的也是15个球，命中率是多少．
<gadget id="calculator">15 + 15</gadget>
<output>30</output>

<gadget id="calculator">15 / 30</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(1/2) * 1</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>