Ratio, Proportion and Rates

1 Level 1 Simplify ratios (missing-term form) 2 Level 2 Equivalent ratios — scaling 3 Level 3 Share an amount in a 2-part ratio 4 Level 4 Share in a 3-part ratio / find one part 5 Level 5 Direct proportion (unitary method) 6 Level 6 Rates: speed, flow, unit price (best buy) 7 Level 7 Multi-step: exchange rates, map scales, share differences, inverse proportion