Ratios and Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, often expressed in the form a:b.

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

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

Back

If a/b = c/d, then ad = bc, where a, b, c, and d are the terms of the proportion.

Front

What does it mean if two ratios are equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities.

Front

How can you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms by their greatest common divisor (GCD).

Front

What is a proportion?

Back

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

Front

How do you convert a ratio to a fraction?

Back

To convert a ratio a:b to a fraction, write it as a/b.

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

How do you find the unit rate from a ratio?

Back

To find the unit rate, divide both terms of the ratio by the second term.

Front

What is the unit rate of 60 miles in 2 hours?

Back

The unit rate is 30 miles per hour.