Class 1 of June planted 150 trees in March, and 140 survived. In April, they planted another 100 trees, and 80 survived. What is the survival rate of these trees?
六1班在三月份植树150棵，成活了140棵，在四月份又植树100棵，成活了80棵，这批树的成活率是多少？
<gadget id="calculator">220 / 250</gadget>
<output>22/25 = around 0.88</output>

<result>22/25 = around 0.88</result>