There is a bottle of milk, Xiaoming drank (3/5) of this bottle of milk, Xiaohong drank (1/5) of this bottle of milk, what percentage of this bottle of milk did Xiaohong drink less than Xiaoming?
有一瓶牛奶，小明喝了这瓶牛奶的(3/5)，小红喝了这瓶牛奶的(1/5)，小红比小明少喝这瓶牛奶的几分之几？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/5) - (1/5)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>