When setting up proportions, be sure to be consistent. Units for the numerators should be the same and units for the denominators should be the same as well.
Proportion Problem: If 2 out of 3 dentists prefer Crest toothpaste, how many prefer Crest out of 600 dentists surveyed?Proportion Problem: In Visalia 3 out of every 7 voters said yes to proposition 40. If 42,000 people voted, how many said no to proposition 40?
Proportion Problem: A recipe calls for 5 tablespoons of sugar for every 8 cups of flour. How many tablespoons of sugar are required for 32 cups of flour?
Coin Problem: Sally has 12 coins consisting of quarters and dimes. The value adds to $2.25. How many of each coin does she have?Mixture Problem: A 50% alcohol solution is mixed with a 10% alcohol solution to create 8 ounces of a 32% alcohol solution. How much of each is needed?
Interest Problem: Mary invested her total savings of $3,400 in two accounts. Her mutual fund account earned 8% interest last year and her CD earned 5%. If her total interest for the year was $245, how much was in each account?Video Examples on YouTube:
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