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    -Understanding ratios (part-to-part and part-to-whole relationships)
    -Ratios in proportional relationships
    -Solve problems using ratios
    -Convert between measurements
    -Understanding rates and unit rates
    -Calculate unit rates and rates of speed
    -Using models to understand percents
    -Percents, fractions, decimals
    -Solve percent problems 
     
     
    -Ratio and unit rate