Calculation: (15/27)-((9/27)+0.25)+(1/4).
计算：(15/27)-((9/27)+0.25)+(1/4)．
<gadget id="calculator">15 / 27</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">9 / 27</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) + 0.25</gadget>
<output>0.583333</output>

<gadget id="calculator">(5/9) - 0.583333</gadget>
<output>-0.027777</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(-0.027777) + (1/4)</gadget>
<output>0.222223</output>

<result>0.222223</result>