tailieunhanh - Wiley publishing inc GMT for dummies Episode 1 part 7

Tham khảo tài liệu 'wiley publishing inc gmt for dummies episode 1 part 7', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 10 Getting Back to Basics Numbers and Operations 133 This word problem asks you how to deal with two percentages the subtraction of the percentage discount and the addition of the percentage sales tax. First calculate the discount. You can figure 15 in your head by knowing that 10 of 52 is and half of that 5 percent is so the discount is . Now subtract the discount from the original price. - . The discount price for the cabinet is . You still need to calculate the sales tax so don t choose C 5 percent of is half of 10 percent or . You add to . The only answer that ends in 1 is D. You can do the math to verify your guess but D is the correct answer. . Not a bad price for some much needed organization Thirty of the seventy male employees in the corporation work part-time. Thirty of the fifty female employees work part-time. What percentage of the employees work part-time A 40 B 50 C 4223 D 60 E 6623 The trick to solving this word problem is to determine the total number of people from which the percentage is derived. You know that there are 70 males and 50 females so there s a total of 120 employees in the corporation. Thirty males and 30 females 60 total work part-time. What percentage of 120 is 60 If it isn t immediately obvious you can determine the answer like this Evaluate the question What percentage of 120 is 60 What means the unknown or what you re trying to find out. Percentage means . Of means multiply. Is means equals. So the following equation results from the question X 120 60 0 50 The correct answer is B. Taking it further Repeated percent change Now suppose you want to show a percent change repeated over a period of time. One occasion in which this concept is used is when you want to figure out how much interest accrues on a bank account after several years. 134 Part IV Conquering the Quantitative Section__ .