Ratios and Proportions with Two-Color Counters

A ratio is a comparison of two quantities. Place 2 yellow counters and 3 red counters on the workspace. The ratio of yellow to red counters can be written using words (2 to 3), using a colon (2:3), or a fraction (2/3). Double the number of yellow and red counters to make the ratio 4:6. A proportion is an equation stating that two ratios are equivalent. The ratios 2:3 and 4:6 form a proportion because their ratios are equivalent.



Ratios and Proportions using the Brainingcamp Two-Color Counters virtual manipulative.

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