A story book has 150 pages, and Cong Cong has read 90 pages, how much more has he read than the rest?
一本故事书有150页，聪聪已经看了90页，已经看的比剩下的多百分之几？
<gadget id="calculator">150 - 90</gadget>
<output>60</output>

<gadget id="calculator">90 - 60</gadget>
<output>30</output>

<gadget id="calculator">30 / 60</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>