A person A purchased some pens for Rs. 350 and sold them for Rs. 450. Another person B purchases some pens for Rs. 540 and sold them for Rs. 660. Then the difference between their profit percents is
1
\(\frac{400}{63}\)
2
\(\frac{200}{9}\)
3
\(\frac{200}{7}\)
4
\(\frac{200}{63}\)