A path to conquering the math skills essential for nursing success...and reducing the anxieties math often induces! Step by step, skill by skill...students progress from simple to complex calculations, building their proficiencies and testing it along the way. It’s perfect for course review and quick reference.

proportion. 32 x = 25 100 x . 100 32 x = 25 100 25x = 3,200 128 25 x 3,200 25 3,200 = 25 25 1 x = 128 STEP 3. Write the answer as a percent. x = 128% 1 ) The answer is 128%. 102 part 1 Basic Math Skills 2056_04_087-114.indd 102 11/5/09 5:16:29 PM Changing a Ratio to a Percent Changing a ratio to a percent is very similar to changing a fraction to a percent. It requires one additional step. These are the steps for changing a ratio to a percent: 1. Write the ratio in fraction form. x

Proportion,” “4.3 Fractions, Ratios, and Percents,” and “4.4 Working with Percents and Decimal Numbers,” if the chapter test indicates you need additional practice. Section 4.1 Solve each proportion for x. 1. 2 x = 5 45 2. x 36 = 4 23 Section 4.2 Write the percent proportion to solve for x. 3. x is 25% of 24. 4. 125 is what percent of 37.5? 5. 139.6 is 20% of x. 6. 7. 1 5 is what percent of ? 2 4 4 % of x is 5. 5 8. 12.5% of 600 is what number? Section 4.3 Change each % to a fraction

19. 99 − (−1) 20. (−8) − (−12) chapter 5 Positive and Negative Numbers 123 2056_05_115-136.indd 123 11/5/09 11:49:27 AM 5.3 Multiplying and Dividing Positive and Negative Numbers In this section, we will review: • a new way to indicate multiplication • rules for multiplying positive and negative numbers • rules for dividing positive and negative numbers A New Way to Indicate Multiplication Parentheses indicate multiplication. For example, 3(9) = 27 (4)(5) = 20 Rules for Multiplying

7 = 3x – 5x + 27 STEP 1. Clear the parentheses on one or both sides by using the distributive property. 3( 3x + 4) - 7 = 3x - 5x 5x + 27 9x + 12 - 7 = 3x - 5x + 27 STEP 2. Collect like terms on each side of the equation. 9x + 5 = -2x + 27 STEP 3. Move − −2x 2x to the left side of the equation by adding 2x to both sides. STEP 4. Add the columns. STEP 5. Move the number 5 to the right side of the equation by subtracting 5 from both sides. STEP 6. Add the columns. STEP 7. Divide both sides by 11.

of the factor 2), multiplying from right to left: 3 × 6 = 18. Write the 8 below the 9 on the ﬁrst partial product line, and carry the 1. Place the 1 over the 4. Next, multiply: 3 × 4 = 12. Add the 1 carried to the 12 to get 13. Write the 3 to the left of the 8, and carry the 1. Next, multiply: 3 × 5 = 15. Add the 1 carried to the 15 to get 16. Write 16 to the left of the 3. 11 1 546 x 32 1 1092 1638 17,472 STEP 3. Add the partial products. The answer is 17,472. chapter 1 Whole Numbers 7