When a tourist bus arrives at the first scenic spot, the number of tourists decreases by 10%, and when it arrives at the second scenic spot, the number of tourists increases by 10%. Does the number of people on board now increase or decrease compared with the original? How much has it increased or decreased?
一辆旅游车到第一个景点时游客减少了10%，到第二个景点时游客又增加了10%，现在车上的人数与原来相比是增加还是减少？增加或减少了多少？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">(9/10) * (11/10)</gadget>
<output>99/100 = around 0.99</output>

<gadget id="calculator">1 - (99/100)</gadget>
<output>1/100 = around 0.01</output>

<result>1/100 = around 0.01</result>