New SAT Math Workbook

B amount of increase 20000 20 000 1 percent of

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Unformatted text preview: increase = 30, 000 = 1 = 100% 5. (A) Amount of decrease = 50 50 1 Percent of decrease = = = 25% 200 4 1 · 60,000 = $15,000 added cost 4 Original sale price = $75,000 20% = 1 5 1 · 75,000 = 15,000 discount 5 Final sale price $60,000 Therefore he made nothing on the sale. 3. (B) Discount = 30 cents. Rate of discount is figured on the original price. 30 1 = = 25% 120 4 4. (D) 12 % = 1 2 1 8 1 · 160 = $20 discount 8 New sale price = $140 3% = 3 100 3 420 · 140 = 100 100 = $4.20 second discount $135.80 final sale price Therefore, $160 – $135.80 or $24.20 was saved. Note: The amount saved is also the sum of the two discounts—$20 and $4.20. 5. (E) $6 is 75% of the marked price. 6= 3 x 4 24 = 3x x = $8 www.petersons.com Verbal Problems Involving Percent 99 Exercise 3 1. (C) She sells 15 ads at $50 each for a total of $750. She earns 6% of this amount. 750 × .06 = $45.00 2. (D) He earns 5% of ($2130 - $750). 1380 × .05 = $69.00 Add this to his base salary of $125: $194. 3. (B) If his base salary was $100, his commission amounted to $702. 702 is 3% of what? 702 = .03x 70,200 = 3x $23,400 = x 4. (A) $27 is 90% of what he collected. 27 = .90x 270 = 9x x = $30 30.00 If each paper sells for 20 cents, he sold .20 Exercise 4 1. (C) 16 2 1 %= 3 6 5 of the original price. 6 $10 is 10 = 5 x 6 60 = 5x x = 12 2. (B) The store gave Alice 80% of the price she paid. 80% = 3. (A) 4 5 4 · 120 = $96 5 $150 is 125% of the cost. 150 = 1.25x 15,000 = 125x x = $120 4. (C) Work with an easy number such as $100 for the selling price. 20% = 1 5 1 · 100 = $20 profit, thereby 5 20 1 80 or 150 papers. 5. making the cost $80. 5. = 4 = 25% (C) $73,600 is 92% of the selling price. 73,600 = .92x 7,360,000 = 92x $80,000 = x (D) The dealer wishes to make 20% or of 5 $60, which is $12 profit. The dealer wishes to clear $60 + $12 or $72. $72 will be 90% of the marked price. 72 = .90x 720 = 9x x = $80 1 www.petersons.com 100 Chapter 6 Exercise 5 1. (B) 20,000 × .075 100 000 1400 000 1500.000 2% of $1000 = $20 3% of $2000 = $60 4% of $3000 = $120 5% of ($25,000 – $6,0...
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This note was uploaded on 08/15/2010 for the course MATH a4d4 taught by Professor Colon during the Spring '10 term at Embry-Riddle FL/AZ.

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