Two road repair teams work together to build a road. Team A repaired the full length (4/9), and Team B repaired more (1/9) than Team A. What fraction of this road has Team B repaired?
两个修路队合修一条公路．甲队修了全长的(4/9)，乙队比甲队多修了(1/9)．乙队修了这条公路的几分之几？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(4/9) + (1/9)</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>