(121/160) Subtract the numerator and denominator at the same time to get (2/5).
(121/160)分子和分母同时减去多少会得到(2/5)．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 160</gadget>
<output>64</output>

<gadget id="calculator">121 - 64</gadget>
<output>57</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">57 / (3/5)</gadget>
<output>95</output>

<result>95</result>