Topic 5 Review - Ratios and Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

How do you write a ratio?

Back

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 then solve for the unknown 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 to find the unknown.

Front

Back

p = 5.

Front

How do you find the total number of items using a ratio?

Back

Multiply the number of items in one part of the ratio by the total number of parts.

Front

If there are 18 keys per calculator, how many keys are there for 11 calculators?

Back

There are 198 keys.

Front

What does it mean to simplify a ratio?

Back

Simplifying a ratio means reducing it to its lowest terms by dividing both sides by their greatest common divisor.

Front

What is the ratio of students to classes if there are 48 students in 2 classes?

Back