A store reported total sales of $385 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 options.
A) 2 %
B) 17 %
C) 20 %
D) 65 %
E) 83 %

Rationale: "new value – old value ) / old value x 100 we are given : february sales this year = 385 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 = 385 million and the old value = 320 million . let ’ s plug them into our percent change formula . ( new value – old value ) / old value x 100 [ ( 385 – 320 ) / 320 ] x 100 65 / 320 x 100 13 / 64 x 100 ≈ 13 / 65 x 100 ≈ 1 / 5 x 100 ≈ 20 % . the answer is c ."
Answer: C