Use Ratios and Proportions Formative Assessment

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, expressed as 'a to b' or a:b.

Front

What is a proportion?

Back

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

Front

How do you solve for a variable in a ratio?

Back

To solve for a variable in a ratio, set up an equation based on the given ratio and cross-multiply if necessary.

Front

What does it mean if two ratios are equivalent?

Back

If two ratios are equivalent, it means they represent the same relationship between quantities.

Front

If a ratio of sunfish to perch is 4:3, how many perch are needed for 300 sunfish?

Back

225 perch are needed.

Front

What is the formula for finding a missing value in a proportion?

Back

If a:b = c:d, then a*d = b*c.

Front

What is the first step in solving a proportion?

Back

The first step is to cross-multiply the terms.

Front

If the ratio of boys to girls in a class is 2:3 and there are 10 boys, how many girls are there?

Back

There are 15 girls.

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 is the denominator.

Front

How can you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common factor.