1. 3-8 PERCENT OF CHANGE MISS BATTAGLIA – ALGEBRA 1 CP OBJECTIVE: FIND PERCENT OF CHANGE AND SOLVE PROBLEMS INVOLVING PERCENT OF CHANGE.

2. WARM UP Alaska is the largest state in the United States, with an area of 570, 374 mi 2. It accounts for about 15% of the country’s area. Estimate the area of the United States.

3. DEFINITIONS

4. EXAMPLE

5. From 1970 to 1990, the total number of physicians in the US increased from 334,000 to 615,400. a)Find the amount of change b)Find the percent of increase.

6. AGRICULTURE Changes in the economy have affected the location and number of farms in the United States. Find the percent of decrease in the number of farms from 1940 to 2000. YearNumber of Farms (thousands) Acres of Farmland (millions) 194061021065 20002140987

7. AGRICULTURE Changes in the economy have affected the location and number of farms in the United States. Find the percent of decrease in the number of acres of farmland from 1940 to 2000. YearNumber of Farms (thousands) Acres of Farmland (millions) 194061021065 20002140987

8. FIND THE PERCENT OF CHANGE a) $12 to $9b) $1.75 to $1.25

9. CLASSWORK http://www.mathplayground.com/percent_shopping.html

10. HOMEWORK Pg 147-148 # 1 – 8, 10, 12, 14, 21, 22, 24, 26