Digits, Grade 7, Volume 1, Homework Helper

9-5: TEKS Practice

  • 1. If the original quantity is 10 and the new quantity is 13, what is the percent increase?

  • 2. Craig likes to collect records. Last year he had 10 records in his collection. Now he has 12 records. What is the percent increase of his collection?

  • 3. If the original quantity is 5 and the new quantity is 3, what is the percent decrease?

  • 4. At noon, a tank contained 10 cm of water. After several hours, it contained 7 cm of water. What is the percent decrease of water in the tank?

  • 5. Estimation Suppose the original quantity is 13 and the new quantity is 1.

    • a. Which of these is the best estimate for the percent change?

      • A. 50%

      • B. 25%

      • C. 100%

      • D. 75%

    • b. Is this an example of a percent increase or a percent decrease?

  • 6. If the original quantity is 15 and the new quantity is 19, which of these is the best estimate for the percent change?

    • A. 50% increase

    • B. 100% decrease

    • C. 75% increase

    • D. 25% increase

  • 7. Last year, the Debate Club had 7 members. This year there are 12 members in the club. Which of these is the best estimate for the percent change in the number of club members?

    • A. 25% increase

    • B. 100% decrease

    • C. 75% increase

    • D. 50% decrease

  • 8. Jake ordered 23 large pizzas for a party. When the party was over he had 6 large pizzas remaining. Estimate the percent change in the number of large pizzas.

    • A. 100% decrease

    • B. 25% increase

    • C. 50% increase

    • D. 75% decrease

  • 9.

    • a. Writing If the original quantity is 25 and the new quantity is 50, what is the percent increase?

    • b. Explain what operation is equivalent to finding this new quantity. Write the explanation as an expression.

  • 10. Money A savings account increases from $250 to $270. What is the percent increase of the savings account?

  • 11. Think About the Process Suppose the original quantity is 175 and the new quantity is 126.

    • a. What expression represents the percent decrease?

      • A. fraction 126 minus 175 , over 175 end fraction

      • B. fraction 175 minus 126 , over 175 end fraction

      • C. fraction 126 minus 175 , over 126 end fraction

      • D. fraction 175 minus 126 , over 126 end fraction

    • b. What is the percent decrease?


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Table of Contents

Digits, Grade 7, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Expressions, Equations, and Relationships Unit C: Measurement and Geometry Unit D: Proportionality English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties