Kaiyuan Primary School planted 150 pine trees of various kinds, of which 3 were not alive. What is the survival rate?
开源小学种植各种松树150棵，其中有3棵未活，成活率是多少．
<gadget id="calculator">150 - 3</gadget>
<output>147</output>

<gadget id="calculator">147 / 150</gadget>
<output>49/50 = around 0.98</output>

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

<gadget id="calculator">(49/50) * 1</gadget>
<output>49/50 = around 0.98</output>

<result>49/50 = around 0.98</result>