Representing ratios -- Squatters -- Ratio drama -- Equal values -- Tape diagrams -- Double number lines -- Comparing ratios -- Graphical representations -- Ratios and decimals -- A round and a round the pie -- Choose it -- Unit and scale factors -- What is a unit rate? -- Different unit rates -- Proportionality and unit rates -- Area unit rates -- Proportional figures -- Solving problems on a double number line -- Animal rates -- How big are these chairs? -- Proportional or not? -- Why cross-multiply? -- Summer travels -- Posing problems -- Percents -- Converting ratios to percents -- Finding percents -- Given a part, find the whole -- Taxes, tips, and commissions -- Percent of increase -- Percent of decrease -- Math in the news -- Working with ratios and percents.