Write a part-to-whole ratio in simplest form

Write the ratio as two numbers with a colon between them, like 3 : 8. Write it in simplest form.

1. There are 8 guitars and 4 drums. Write the ratio of guitars to all of the instruments in simplest form.
2. There are 10 tulips and 15 daffodils. Write the ratio of tulips to all of the flowers in simplest form.
3. There are 2 boys and 6 girls. Write the ratio of boys to all of the students in simplest form.
4. There are 6 cats and 9 dogs. Write the ratio of dogs to all of the pets in simplest form.
5. There are 4 guitars and 8 drums. Write the ratio of drums to all of the instruments in simplest form.
6. There are 4 apples and 12 pears. Write the ratio of pears to all of the pieces of fruit in simplest form.
7. There are 5 cars and 5 bikes. Write the ratio of cars to all of the vehicles in simplest form.
8. There are 5 hens and 15 ducks. Write the ratio of hens to all of the birds in simplest form.
9. There are 9 cats and 15 dogs. Write the ratio of dogs to all of the pets in simplest form.
10. There are 2 hens and 10 ducks. Write the ratio of ducks to all of the birds in simplest form.
11. There are 2 cats and 2 dogs. Write the ratio of dogs to all of the pets in simplest form.
12. There are 10 hens and 15 ducks. Write the ratio of ducks to all of the birds in simplest form.
13. There are 15 apples and 18 pears. Write the ratio of pears to all of the pieces of fruit in simplest form.
14. There are 4 guitars and 24 drums. Write the ratio of drums to all of the instruments in simplest form.
15. There are 5 cats and 20 dogs. Write the ratio of dogs to all of the pets in simplest form.
16. There are 8 hens and 2 ducks. Write the ratio of ducks to all of the birds in simplest form.
17. There are 32 tulips and 28 daffodils. Write the ratio of daffodils to all of the flowers in simplest form.
18. There are 9 hens and 21 ducks. Write the ratio of hens to all of the birds in simplest form.
19. There are 20 red marbles and 28 blue marbles. Write the ratio of red marbles to all of the marbles in simplest form.
20. There are 4 cars and 14 bikes. Write the ratio of cars to all of the vehicles in simplest form.