Percent Increase and Decrease 7 th grade math

Percent Increase and Decrease 7 th grade math

Let's Review. . . • Proportion – a statement that two ratios are equivalent • Percent – compares a number to 100 • Rate – a ratio that compares two quantities measured in different units • Ratio - a comparison of two numbers by division • Unit rate – a rate in which the second quantity in the comparison is one unit.

• Find the amount of sales tax if the sales tax is 5% and the cost of the item is $40? Calculating Percent of a Number Is ____ = Of % ______ 100 • What IS 5% OF 40?

Finding Percent increase Percent Change = (amount of change) / (original amount) • Amber got a raise, and her hourly wage increased from $8 to $9. 50. What is the percent increase?

• David moved from a house that is 89 miles away from his workplace to a house that is 51 miles away from his workplace. What is the percent decrease in the distance from his home to his workplace? Percent decrease Percent Change = (amount of change) (original amount)

Using percent of change • The grizzly bear population in Yellowstone National Park in 1970 was about 270. Over the next 35 years, it increased by about 115%. What was the population in 2005?

What's next? • Assignment – submit TO THE ASSIGNMENT in schoology • Video Quiz – retake till you get 100% • TEAMS discussions – please attend at least 1 session each week to check in