Proportions
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Intros
Lessons
- Ratios, Rates, and Proportions
- What are they?
 - How are they different from each other?
 
 - How to do cross-multiplication?
 
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Examples
Lessons
- Find the missing value.
 - 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?
 - 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?
 - 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?
 

