A shirt goes on sale for 70% of its original price. One week later, the sale price is marked down 10%. The final price is what percent of the original price?
Choose the most appropriate option
A) 63 % B) 70 % C) 62 % D) 50 % E) 28 %

Rationale: just assume original price is 100 . sale price = 70 then it is marked down by 10 % = 70 - 7 = 63 . hence it is 63 % od the original price . hence answer is a .
Answer: A