Worksheet skill
Ratio and proportion worksheets
Practice equivalent ratios and missing values in proportions. Choose a starting set, then adjust the numbers.
Sample worksheet
Download the sample worksheet and answer key, or open the builder to change the settings.
Download sample PDF
Change the settings
Before starting: Use multiplication to scale quantities and keep corresponding units in the same order.
After this: Find a unit rate and use it to solve a proportion with an unfamiliar scale factor.
Example questions
- 3/4 = ___/20
- A recipe uses 5 cups for 8 servings. How many cups are needed for 24 servings?
- A car travels 180 miles in 3 hours. What is the unit rate?
Settings in the builder
- ratio size
- missing-term position
- context or equation form
Worked example
3/4 = x/20
Answer: x = 15
How to solve it
The denominator changes from 4 to 20 by multiplying by 5. Multiply the numerator by the same factor: 3 x 5 = 15.
Common mistakes
What to check
- adding the same amount to both terms
- mixing units across equivalent ratios
Ways to review the work
- 1
Label units on both rows of a ratio table before scaling.
- 2
Ask why adding 16 to both terms would not preserve the ratio 3 to 4.
Teaching content updated 2026-09-05. Read our accuracy standards.