Ratios and Proportions

Front

What is a ratio?

Back

A comparison of two quantities, showing the relative size of one quantity to another.

Front

What is a proportion?

Back

An equation that states that two ratios are equal.

Front

What is a unit rate?

Back

A ratio that compares a quantity to one unit of another quantity.

Front

How do you find a unit rate?

Back

Divide the quantity by the number of units.

Front

What is the first step in solving a proportion?

Back

Write a word label to clarify the quantities involved.

Front

If 10 apples cost $2.00, what is the unit rate per apple?

Back

$0.20 per apple.

Front

What does it mean to simplify a ratio?

Back

To reduce the ratio to its simplest form by dividing both terms by their greatest common divisor.

Front

How can ratios be expressed?

Back

Ratios can be expressed as fractions, with a colon (:) or with the word 'to'.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be represented as fractions, where the first quantity is the numerator and the second is the denominator.

Front

What is cross-multiplication in proportions?

Back

A method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other ratio.