(1/4)*2+50%*(7/4)-0.5=
(1/4)*2+50%*(7/4)-0.5=
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">7 / 4</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">(1/2) * (7/4)</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">(7/8) - 0.5</gadget>
<output>0.375</output>

<gadget id="calculator">(1/2) + 0.375</gadget>
<output>0.875</output>

<result>0.875</result>