Add the same number to the numerator and denominator of the fraction (5/8), and simplify the new fraction to (3/4). What is the same number added.
把分数(5/8)的分子和分母都加上一个相同的数，得到的新分数化简为(3/4)．加上的这个相同的数是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 8</gadget>
<output>6</output>

<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / (1/4)</gadget>
<output>4</output>

<result>4</result>