A book has 120 pages, read the whole book (1/4) on the first day, and read 20 pages on the second day, what fraction of the whole book was read in two days?
一本书120页，第一天看了全书的(1/4)，第二天看了20页，两天共看了全书的几分之几？
<gadget id="calculator">20 / 120</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/6) + (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<result>5/12 = around 0.416667</result>