Ratios and Proportions Percent Change

Proportion – Statement showing two ratios as equal

All of these are proportions because the cross products are equal

Example

Practice Problems Solve each proportion.

Practice Problems Solve each proportion.

Practice Problems Solve each proportion.

Practice Problems

Capture - Recapture Complete The worksheet Answers all the questions on the bottom of sheet Turn in one sheet per person

Capture / Recapture - Example

Percent Change

Vocabulary Percent Change – When an increase or decrease is expressed as a percentage Percent Increase – A change that is greater than the original Percent Decrease – A change that is less than the original

Practice Problems State whether each percent of change is a percent of increase or a percent of decrease. Then find each percent of change. Round to the nearest whole percent.

Practice Problems State whether each percent of change is a percent of increase or a percent of decrease. Then find each percent of change. Round to the nearest whole percent.

Practice Problems

Use cross product to determine whether each pair of ratios form a proportion.

Practice Problems Use cross product to determine whether each pair of ratios form a proportion.

Practice Problems Use cross product to determine whether each pair of ratios form a proportion.

Practice Problems Solve each proportion.

Practice Problems Solve each proportion.

Practice Problems

State whether each percent of change is a percent of increase or a percent of decrease. Then find each percent of change. Round to the nearest whole percent.

Practice Problems State whether each percent of change is a percent of increase or a percent of decrease. Then find each percent of change. Round to the nearest whole percent.

Practice Problems

Homework – Write in planner 3-6 Ratios and Proportions (2 pages) 3-7 Percent Change (2 pages) Even Problems