Xiaohong reads a 150-page story book. I read 20% on the first day, and the remaining 30% on the second day. How many pages were read in total in the two days?
小红看一本150页的故事书．第一天看了20%，第二天看了剩下的30%，两天一共看了多少页．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(1/5) + (3/10)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">150 * (1/2)</gadget>
<output>75</output>

<result>75</result>