Cars A and B travel from A to B at the same time. The speed of car A is 7/8 of that of car B. Car A takes 16 hours. How much less time does car B take than car A for the whole journey.
甲乙两车同时由A到B，甲车速度是乙车的(7/8)，甲车用16小时，乙车行全程比甲少用多少小时．
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 - (7/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">16 * (1/8)</gadget>
<output>2</output>

<result>2</result>