Team A and Team B jointly build a highway. Team A has built the full length (3/7), and Team B has built the full length (4/7). What percentage of the road has Team B built more than Team A?
甲乙两队合修一条公路，甲队修了全长的(3/7)，乙队修了全长的(4/7)，乙队比甲队多修这条公路的几分之几？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(4/7) - (3/7)</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>