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Intros
Lessons
  1. Ratios, Rates, and Proportions
    • What are they?
    • How are they different from each other?
  2. How to do cross-multiplication?
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Examples
Lessons
  1. Find the missing value.
    1. 34=9\frac{3}{4} = \frac{9}{{}}
    2. 5=3036\frac{5}{{}} = \frac{{30}}{{36}}
    3. 2149=7\frac{{21}}{{49}} = \frac{{}}{7}
    4. 5=1830\frac{{}}{5} = \frac{{18}}{{30}}
  2. A butter cookie recipe calls for 250 g of butter and 170 g of sugar. How much sugar is needed if there is 625 g of butter?
    1. The scale of a map is 1.5 cm to 30 km. What is the actual distance between two places which are 33.5 cm apart from each other on the map?
      1. There is 54 g of fruits in a smoothie. If the ratio of strawberry and blueberry in the smoothie is 5:4, how much of each fruit is there in the smoothie?
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        Practice