Page 487 - Basic College Mathematics with Early Integers

Vocabulary and Readiness Check

Use the choices below to fill in each blank.These choices will be used more than once.

amount base percent

1. When translating the statement “20% of 15 is 3” to a proportion, the number 3 is called the , 15 is
the , and 20 is the .
2. In the question “50% of what number is 28?”, which part of the percent proportion is unknown?
3. In the question “What number is 25% of 200?”, which part of the percent proportion is unknown?
4. In the question “38 is what percent of 380?”, which part of the percent proportion is unknown?
amount percent
Identify the amount, the base, and the percent in each equation. Recall that = .
base 100
12.6 30 201 67 20 102 40 248
5. = 6. = 7. = 8. =
42 100 300 100 100 510 100 620

6.3 Exercise Set FOR EXTRA HELP

Objective Translating Translate each to a proportion. Do not solve. See Examples 1 through 6.

1. 98% of 45 is what number? 2. 92% of 30 is what number?

3. What number is 4% of 150? 4. What number is 7% of 175?

5. 14.3 is 26% of what number? 6. 1.2 is 47% of what number?

7. 35% of what number is 84? 8. 85% of what number is 520?

9. What percent of 400 is 70? 10. What percent of 900 is 216?

11. 8.2 is what percent of 82? 12. 9.6 is what percent of 96?

Objective Solve. See Example 7.

13. 40% of 65 is what number? 14. 25% of 84 is what number?

15. What number is 18% of 105? 16. What number is 60% of 29?

Solve. See Examples 8 and 9.

17. 15% of what number is 90? 18. 55% of what number is 55? Copyright 2012 Pearson Education, Inc.

19. 7.8 is 78% of what number? 20. 1.1 is 44% of what number?

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