A car has driven 70% of the journey from place A to place B, and has driven the remaining 30%, so what percentage of the journey remains?
一辆汽车从甲地开往乙地，已经行驶了全程的70%，又行驶了剩下的30%，还剩全程的百分之几没行驶？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/10) * (3/10)</gadget>
<output>9/100 = around 0.09</output>

<gadget id="calculator">1 - (7/10) - (9/100)</gadget>
<output>21/100 = around 0.21</output>

<result>21/100 = around 0.21</result>