Some reading contain mathematical information, especially percentages. Understanding mathematical information can lead to a deeper understanding of a reading.
A. Work with a partner. Read the questions below. Then go back to the text to find the information that you will need to answer the questions. The information in the box below the questions will help you calculate percentage increase or decrease.
1. Monkeys usually live 27 years. To what age do scientists expect Canto to live?
2. Mice usually live for 12 months. How many months do scientists expect the mice that ate fewer calories to live?
Working with percentages
10% = .10 10% of 30 = (.10 x 30) = 3
A 10% increase of 30 = 30 + (.10 x 30) = 33
A 10% decrease of 30 = 30 – (.10 x 30) =27
B. Show your understanding of percentage data. Answer the questions below.
1. Average life expectancy in the United States is 77 years. How long do scientists expect average Americans on low-calorie diets to live if they expect them to increase their life expectancy by 2 percent?
2. How long do scientists expect average Americans on low-calorie diets to live if they expect them to increase their life expectancy by 9 percent?
3. If a woman who normally eats 2000 calories a day restricts her calories a day by 35 percent, how many calories a day will she eat?
Find words in the chart that match the definitions. Answers to1-4 are from Chapter 7 Answer to 5-8 are from Chapter 8 Answers to 9-12 are from chapter 9.
1. To gather fruit or vegetables _____
2. Something used to represent something else_______
3. Describing food that makes your body healthy______
4. Where something comes from______
5. To cook food at a very high heat, usually in oil____
6. A plant that comes from the sea______
7. To separate something from other taste to food____
8. To add spices or other taste to food_____
9. A unit of energy in food_____
10. The average time that a group of people or animals will live____
11. To use something, for example, fuel, energy, or time_____
12. By a large amount_________