Sixth grade girls take the physical education standard test. There are 39 students who have reached the standard, and 1 student who has not reached the standard. What is the standard rate?
六年级女生进行体育达标测试，达标的同学有39人，未达标的有1人，达标率是多少．
<gadget id="calculator">39 + 1</gadget>
<output>40</output>

<gadget id="calculator">39 / 40</gadget>
<output>39/40 = around 0.975</output>

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

<gadget id="calculator">(39/40) * 1</gadget>
<output>39/40 = around 0.975</output>

<result>39/40 = around 0.975</result>