There are 25 girls and 20 boys in Mingming class. Pick a person at random, what is the probability that Mingming will be chosen?
明明班有25名女生，20名男生．任意挑选一人，选到明明的可能性是几分之几？
<gadget id="calculator">20 + 25</gadget>
<output>45</output>

<gadget id="calculator">1 / 45</gadget>
<output>1/45 = around 0.022222</output>

<result>1/45 = around 0.022222</result>