A community planted 120 trees last year, but 18 of them failed to survive. Find the survival rate.
某小区去年植树120棵，有18棵没成活．求成活率．
<gadget id="calculator">120 - 18</gadget>
<output>102</output>

<gadget id="calculator">102 / 120</gadget>
<output>17/20 = around 0.85</output>

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

<gadget id="calculator">(17/20) * 1</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>