ratios and proportions test

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 a proportion?

Back

To solve a proportion, cross-multiply the terms and set the products equal to each other.

Front

If 1 cm on a map represents 25 km, how many km does 7 cm represent?

Back

175 km

Front

What is the formula to find the total number of items based on a ratio?

Back

Total items = (part/ratio) * total ratio.

Front

How do you convert a ratio to a fraction?

Back

To convert a ratio to a fraction, write the first quantity as the numerator and the second as the denominator.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, and vice versa, as they both represent a comparison of quantities.

Front

If 13 out of 20 homes have a computer, how many computers are expected in 60 homes?

Back

39 computers

Front

What is the unit rate?

Back

The unit rate is a ratio that compares a quantity to one unit of another quantity.

Front

How do you find the unit rate from a ratio?

Back

To find the unit rate, divide both quantities in the ratio by the second quantity.