75% of a number is 150, what is this number?
一个数的75%是150，这个数是多少．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">150 / (3/4)</gadget>
<output>200</output>

<result>200</result>