steel pipe, its (5/9) is used for the first time, and its (3/9) is used for the second time. What fraction of this steel pipe is used less for the second time than for the first time?
一根钢管，第一次用去它的(5/9)，第二次用去它的(3/9)．第二次比第一次少用这根钢管的几分之几？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(5/9) - (1/3)</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>