Jon makes 3/4's the salary that Karen makes. John makes $3000 per month. How long will it take him to make the same amount of money that Karen does in 3 months?
Karen makes $3000 / (3/4) = $
<gadget id="calculator">3000/(3/4)</gadget>
<output>4_000</output>
4000 per month.
In three months, Karen would make a total of $4000 * 3 = $
<gadget id="calculator">4000*3</gadget>
<output>12_000</output>
12000.
To make the same amount of money John would need to work $12000 / $3000 = 
<gadget id="calculator">12000/3000</gadget>
<output>4</output>
4 months.

<result>4</result>