Subtract (11/15) from the minuend to get (3/15), find the minuend.
从被减数中减去(11/15)后得(3/15)，求被减数．
<gadget id="calculator">3 / 15</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">11 / 15</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">(1/5) + (11/15)</gadget>
<output>14/15 = around 0.933333</output>

<result>14/15 = around 0.933333</result>