A piece of fabric was used by Xiaolan to make a shirt (3/9), and mother used it to make a skirt (4/9), how much of this piece of fabric did they share? What fraction of the fabric is left over?
一块布料，小兰做衬衣用去了(3/9)，妈妈做裙子用去了(4/9)，她们共用去了这块布料的几分之几？剩下的占这块布料的几分之几？
<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">1 - (7/9)</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>