There are two baskets of apples, and basket A accounts for (11/20) of the total. If 7.5 kilograms are taken from basket A and put into basket B, then basket B accounts for (3/5) of the total. How many kilograms of apples are there in basket A?
有两筐苹果，甲筐占总数的(11/20)，如果从甲筐取出7.5千克放入乙筐，这时乙筐占总数的(3/5)，甲筐原来有多少千克苹果．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">11 / 20</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">1 - (11/20)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">(3/5) - (9/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">7.5 / (3/20)</gadget>
<output>50</output>

<gadget id="calculator">50 * (11/20)</gadget>
<output>55/2 = around 27.5</output>

<result>55/2 = around 27.5</result>