6-5 Percent Change Percent change- the amount a number decreases or increases with respect to the original amount Percent change formula: amount of change original amount (remember the fraction line means divide)

1.) 25 is decreased to 20 2.) 20 is increased to 45 3.) 15 is increased to 21 4.) 90 is decreased to 81

Biggest Loser 5.) On series one of the Biggest loser, Ryan Benson weighed 300 pounds at the beginning of the season. When he won the season he weighed 195 pounds. What was his percent decrease in weight? 6.) On series three of the Biggest loser, Matt Hover weighed 400 pounds at the beginning of the season. When he won the season he weighed 220 pounds. What was his percent decrease in weight? 7.) Which contestant lost a larger percent of their body weight?

Find the new amount. 8.) 45 increases by 20% 9.) 85 decreases by 30%

Demonstrate Understanding: 1.) Original: 20 New: 15 2.) Original: 80 New: 124 Identify the change as an increase or decrease. Then find the percent change. Find the new amount. 3.) Increase 66 by 20% 4.) Decrease 80 by 12%