New SAT Math Workbook

Circle the letter that appears before your answer 1

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Unformatted text preview: 2 (B) 3 (C) 12 (D) 18 (E) 24 What percent of 90 is 120? (A) 75 (B) (C) (D) (E) 133 125 120 1 1 3 1 3 4. 500 is 200% of what number? (A) 250 (B) 1000 (C) 100 (D) 750 (E) 300 To multiply a number by 137 %, the number 2 should be multiplied by (A) (B) (C) (D) (E) 137.5 13750 1.375 13.75 .1375 1 2. 5. 3. www.petersons.com 82 Chapter 5 RETEST Work out each problem. Circle the letter that appears before your answer. 1. Write as a fraction in lowest terms: .25%. 1 4 1 (B) 40 1 (C) 400 1 (D) 4000 1 (E) 25 3 Write % as a decimal. 4 6. m is 62 (A) (B) (C) (D) (E) (A) 1 % of what number? 2 5m 8 8m 5 8m 5 8m 8 5m 2. 7. What percent of 12 is 2? (A) (B) (C) (D) (E) 600 1 2 2 16 3 2 6 3 (A) (B) (C) (D) (E) 3. .75 75.0 .075 .0075 7.5 12 Find 12% of 80. (A) 10 (B) .96 (C) .096 (D) 960 (E) 9.6 18 is 20% of what number? (A) 3.6 (B) 90 (C) 72 (D) 21.6 (E) 108 What is b% of 6? (A) (B) (C) (D) (E) 3b 50 3 50 b 50 b 3 50 3b b 150 6 8. 4. What is 140% of 70? (A) 9800 (B) 980 (C) .98 (D) 9.8 (E) 98 How many fifths are there in 280%? (A) 28 (B) 1.4 (C) 14 (D) 56 (E) 2.8 1 3 9. 5. 10. What percent of 12 is 16? (A) (B) (C) (D) (E) 133 125 75 80 1 1 4 www.petersons.com Percent 83 SOLUTIONS TO PRACTICE EXERCISES Diagnostic Test 1. 2. 3. 4. 5. (C) 4.5% = (D) 4.5 45 9 = = 100 1000 200 Exercise 1 1. (C) 3 % = 3.5% = .035 To change a percent 2 to a decimal, move the decimal point two places to the left. (B) 85% = 85 17 = 100 20 1 2 % = .4% = .004 5 2. 3. (C) 62 % = (B) 1 2 55 ⋅ 80 = 50 88 10 6% = .06 .06 · b = .06b Divide by .40. 4. (E) To change a decimal to a percent, move the decimal point two places to the right. 4.6 = 460% 5 25 (D) 80 = .40x 200 = x (B) 1 5 83 % = 3 6 5 c= x 6 6c = 5 x 6c =x 5 (C) 12 3 ⋅ 100 = 125 2 = 41 % 3 3 6. Multiply by 6. Divide by 5. 5. To change a fraction to a percent, multiply by 100. (B) 1 % = .5% = .005 2 Exercise 2 1. (C) 40% = 8 7. 8. 9. (E) (D) (B) 1 7 14 87 % = = 2 8 16 16 2 = = 40% 40 5 2 5 2 ⋅ 40 = 16 5 2. (E) 112% = 1.12 1.12 · 80 = 89.6 72 6 = = 120% 60 5 10. (...
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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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