7th Grade Math Ratios & Proportions Test Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the quantity by the number of units. For example, if 30 words are typed in 1 minute, the unit rate is 30 words per minute.

Front

If Todd cleaned out 1/4 of his storage shed in 2/3 hour, how long will it take him to clean out the full shed?

Back

8/3 hours.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the ratio between two proportional quantities, often represented as 'k' in the equation y = kx.

Front

If a 12-ounce bottle of shampoo lasts 16 weeks, how long would an 18-ounce bottle last?

Back

24 weeks.

Front

What is the formula for finding the total amount in a proportional relationship?

Back

The formula is y = kx, where y is the total amount, k is the constant of proportionality, and x is the quantity.

Front

How do you solve for x in the equation y = 19.25x?

Back

To solve for x, divide both sides by 19.25: x = y / 19.25.

Front

What does it mean if two quantities are directly proportional?

Back

If two quantities are directly proportional, as one quantity increases, the other quantity increases at a constant rate.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.