25% of a number is 17.5 less than its 42.5%. Find this number.
一个数的25%比它的42.5%少17.5，求这个数．
<gadget id="calculator">42.5 / 100</gadget>
<output>0.425</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">0.425 - (1/4)</gadget>
<output>0.175</output>

<gadget id="calculator">17.5 / 0.175</gadget>
<output>100</output>

<result>100</result>