The number A is (3/4), the number B is (1/5), the number C is equal to the difference between A and B, what is the sum of the three numbers.
甲数是(3/4)，乙数是(1/5)，丙数等于甲、乙两数之差，三个数之和是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/4) - (1/5)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">(11/20) + (3/4) + (1/5)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>