Subtract the sum of (2/15) and (1/3) from (3/5), what is the difference?
从(3/5)里减去(2/15)与(1/3)的和，差是多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

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

<gadget id="calculator">(2/15) + (1/3)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">(3/5) - (7/15)</gadget>
<output>2/15 = around 0.133333</output>

<result>2/15 = around 0.133333</result>