A barrel of oil, pour out the barrel of oil for the first time (4/9), pour out less of the barrel of oil in the second time than the first time (1/9), pour out a fraction of the barrel of oil in the second time How much?
一桶油，第一次倒出这桶油的(4/9)，第二次比第一次少倒了这桶油的(1/9)，第二次倒了这桶油的几分之几？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(4/9) - (1/9)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>