What is the number obtained by subtracting the sum of (5/8) and (1/2) from their difference?
(5/8)与(1/2)的和与它们的差相减，得数是多少？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(5/8) + (1/2)</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">(5/8) - (1/2)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(9/8) - (1/8)</gadget>
<output>1</output>

<result>1</result>