A store reported total sales of $416 million for February of this year. If the total sales for the same month last year was $320 million, approximately what was the percent increase in sales?
Choose the correct choice from the following choices:  A) 2 %  B) 17 %  C) 30 %  D) 65 %  E) 83 %

Rationale: "new value – old value ) / old value x 100 we are given : february sales this year = 416 million february sales last year = 320 million we need to determine the percent increase between sales from last year to sales this year . thus , the new value = 416 million and the old value = 320 million . let ’ s plug them into our percent change formula . ( new value – old value ) / old value x 100 [ ( 416 – 320 ) / 320 ] x 100 = 30 % the answer is c ."
Answer: C