A book has 160 pages in total. I read 1/8 of the whole book on the first day, and 15 pages on the second day, leaving a fraction of the whole book.
一本书共160页，第一天看了全书的(1/8)，第二天读了15页，还剩全书的几分之几．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">15 / 160</gadget>
<output>3/32 = around 0.09375</output>

<gadget id="calculator">1 - (1/8) - (3/32)</gadget>
<output>25/32 = around 0.78125</output>

<result>25/32 = around 0.78125</result>