Forest farm planted trees in spring, 24,570 trees survived and 630 trees died. Find the survival rate.
林场春季植树，成活了24570棵，死了630棵，求成活率．
<gadget id="calculator">24_570 + 630</gadget>
<output>25_200</output>

<gadget id="calculator">24_570 / 25_200</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>