Unit 6.1 Ratios and Proportions

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

How do you simplify a ratio?

Back

To simplify a ratio, 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 solve a proportion?

Back

To solve a proportion, cross-multiply and then isolate the variable.

Front

What is the cross-multiplication method?

Back

The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If 4/5 = x/20, what is x?

Back

x = 16.

Front

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

Back

If a/b = c/d, then ad = bc.

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 simplest form of the ratio 12:16?

Back

The simplest form is 3:4.

Front

If a car travels 60 miles in 1 hour, how far does it travel in 30 minutes?

Back

It travels 30 miles.