Ratios: find the other group when you know one count
Use the ratio to find how many are in one part, then find the other group.
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The ratio of fiction books to non-fiction books is 1 : 3. There are 12 non-fiction books. How many fiction books are there?
Answer: 4
The ratio of tulips to daffodils is 2 : 1. There are 10 tulips. How many daffodils are there?
Answer: 5
The ratio of apples to oranges is 3 : 2. There are 12 apples. How many oranges are there?
Answer: 8
Tip: Use the ratio to find how many are in one part, then find the other group.
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- Next in this topic Ratios: use the difference to find the total Grade 6
- Ready for more Ratios: find the other quantity Grade 7
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- Mix It, Pace It: Ratio, Rate and Percent Grades 6–7 · printable lessons
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