There are two stores A and B. If the profit of store A increases by 20% and the profit of store B decreases by 10%, then the profits of the two stores are the same. What is the original profit of store A as a percentage of the original profit of store B? ．
有甲、乙两家商店，如果甲店的利润增加20%，乙店的利润减少10%，那么这两店的利润就相同，原来甲店的利润是原来乙店的利润的百分之多少．
<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">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(9/10) / (6/5)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>