Ratios and Proportions Practice

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

What is a proportion?

Back

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

Front

Back

Cross-multiply to get 3 * 36 = 27 * x, then solve for x. The answer is x = 4.

Front

What is the unit rate?

Back

The unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'per unit'.

Front

How do you determine if two ratios are proportional?

Back

Two ratios are proportional if their cross products are equal.

Front

If 1 ZAR is equal to 0.07 USD, how many ZAR will you get for 7 USD?

Back

You will get 100 ZAR.

Front

What is the best way to compare prices for bulk items?

Back

Calculate the unit price (price per item or per dozen) to determine the best deal.

Front

What does it mean if a table shows a proportional relationship?

Back

It means that as one quantity increases, the other quantity increases at a constant rate.

Front

How do you find the missing value in a proportion?

Back

Set up the proportion and cross-multiply to solve for the missing value.

Front

What is the formula for finding a percentage of a number?

Back

The formula is (part/whole) * 100 = percentage.