Ratio and Proportion

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, expressed as 'a: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 proportion?

Back

Cross-multiply the terms and then isolate the variable.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.

Front

If 12/6 = 4/n, what is n?

Back

n = 2.

Front

Is the statement 8 : 9 = 24 : 18 true or false?

Back

False.

Front

How do you find the unit rate?

Back

Divide the total quantity by the number of units.

Front

If a pizza costs $12 and has 8 slices, what is the cost per slice?

Back

$1.50.

Front

In a recipe, if 2 cups of sugar are needed for 3 lemons, how many lemons are needed for 6 cups of sugar?

Back

9 lemons.

Front

What is the cross-multiplication method?

Back

A method used to solve proportions by multiplying the extremes and the means.