75% of a number is 15, what is (5/6) of this number?
一个数的75%是15，这个数的(5/6)是多少．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">15 / (3/4)</gadget>
<output>20</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">20 * (5/6)</gadget>
<output>50/3 = around 16.666667</output>

<result>50/3 = around 16.666667</result>