A person saved $10 in buying an item on sale. If he spent $200 for the item, approximately how much percent he saved in the transaction?
Choose the correct choice from the following answers:
A) 8 %	B) 10 %	C) 2 %	D) 5 %	E) 6 %

Rationale: "actual price = 200 + 10 = $ 210 saving = 10 / 210 * 100 = 100 / 21 = 5 % approximately answer is d"
Answer: D