Ratios, Rates, & Proportions

Front

What is a ratio?

Back

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

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or price per item.

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 two ratios and set the products equal to each other.

Front

If 4 apples cost $2, how much do 10 apples cost?

Back

$5.

Front

What is 45% of 200?

Back

90.

Front

If a car travels 60 miles in 1 hour, how far will it travel in 3 hours?

Back

180 miles.

Front

What is the formula to find a percentage of a number?

Back

Percentage = (Part/Whole) x 100.

Front

If 3 pencils cost $1.50, how much do 12 pencils cost?

Back

$6.00.

Front

What is the relationship between ratios and fractions?

Back

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