The speed of car A is 85% of that of car B. How much slower is car A than car B?
甲车的速度是乙车的85%，甲车速度比乙车慢百分之几？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>