Ratio Basics

  • 6th Grade
Reviewed by Cierra Henderson
Cierra Henderson, MBA |
K-12 Expert
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Cierra is an educational consultant and curriculum developer who has worked with students in K-12 for a variety of subjects including English and Math as well as test prep. She specializes in one-on-one support for students especially those with learning differences. She holds an MBA from the University of Massachusetts Amherst and a certificate in educational consulting from UC Irvine.
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| Attempts: 41 | Questions: 15 | Updated: Jan 20, 2026
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Question 1 / 15
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1) The ratio 15:20 simplifies to 3:4.

Explanation

Divide both by 5 → 15 ÷ 5 = 3, 20 ÷ 5 = 4.

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About This Quiz
Ratio Basics - Quiz

Ever split snacks between friends or compared pencils to erasers in your box? That’s ratios! In this quiz, you’ll practice simplifying simple ratios step by step to see how quantities relate. Take this quiz to master the basics of ratios with easy, real-life examples.

2) The ratio of boys to girls in a class is 10:25. Can you simplify it?

Explanation

Divide both by 5 → 10 ÷ 5 = 2, 25 ÷ 5 = 5.

Submit

3) Which is the simplest form of 9:12?

Explanation

Divide both by 3 → 9 ÷ 3 = 3, 12 ÷ 3 = 4.

Submit

4) In a recipe, the ratio of flour to sugar is 6:9. Simplify the ratio.

Explanation

Divide both by 3 → 6 ÷ 3 = 2, 9 ÷ 3 = 3.

Submit

5) The simplest form of 44:66 is 2:3.

Explanation

Divide both by 22 → 44 ÷ 22 = 2, 66 ÷ 22 = 3.

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6) Simplify 9:15.

Explanation

Divide both by 3 → 9 ÷ 3 = 3, 15 ÷ 3 = 5.

Submit

7) Can you simplify the ratio 12:18?

Explanation

Divide both by 6 → 12 ÷ 6 = 2, 18 ÷ 6 = 3.

Submit

8) Simplify 35:49.

Explanation

Divide both by 7 → 35 ÷ 7 = 5, 49 ÷ 7 = 7.

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9) Simplify the ratio 100:400.

Explanation

Divide both by 100 → 100 ÷ 100 = 1, 400 ÷ 100 = 4.

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10) Simplify the ratio 21:14.

Explanation

Divide both by 7 → 21 ÷ 7 = 3, 14 ÷ 7 = 2.

Submit

11) The number of apples to oranges is 8:12. Simplify this ratio.

Explanation

Divide both by 4 → 8 ÷ 4 = 2, 12 ÷ 4 = 3.

Submit

12) If a class has 12 boys and 16 girls, what is the simplified ratio of boys to girls?

Explanation

Divide both by 4 → 12 ÷ 4 = 3, 16 ÷ 4 = 4.

Submit

13) 30:45 simplifies to 2:3.

Explanation

Divide both by 15 → 30 ÷ 15 = 2, 45 ÷ 15 = 3.

Submit

14) Simplify 18:42.

Explanation

Divide both by 6 → 18 ÷ 6 = 3, 42 ÷ 6 = 7.

Submit

15) Which of these ratios is equivalent to 4:6?

Explanation

4:6 simplifies to 2:3. Multiply → 6:9 is also equivalent.

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Cierra Henderson |MBA |
K-12 Expert
Cierra is an educational consultant and curriculum developer who has worked with students in K-12 for a variety of subjects including English and Math as well as test prep. She specializes in one-on-one support for students especially those with learning differences. She holds an MBA from the University of Massachusetts Amherst and a certificate in educational consulting from UC Irvine.
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The ratio 15:20 simplifies to 3:4.
The ratio of boys to girls in a class is 10:25. Can you simplify it?
Which is the simplest form of 9:12?
In a recipe, the ratio of flour to sugar is 6:9. Simplify the ratio.
The simplest form of 44:66 is 2:3.
Simplify 9:15.
Can you simplify the ratio 12:18?
Simplify 35:49.
Simplify the ratio 100:400.
Simplify the ratio 21:14.
The number of apples to oranges is 8:12. Simplify this ratio.
If a class has 12 boys and 16 girls, what is the simplified ratio of...
30:45 simplifies to 2:3.
Simplify 18:42.
Which of these ratios is equivalent to 4:6?
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