Ratios and Rates Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed in the form 'a:b'.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms of the ratio by their greatest common divisor (GCD).

Front

What is a rate?

Back

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

Front

What is an equivalent ratio?

Back

Equivalent ratios are two or more ratios that express the same relationship between quantities, such as 1:2 and 2:4.

Front

How do you find the unit price?

Back

To find the unit price, divide the total cost by the number of units. For example, if 5 pounds of fish cost $16.20, the unit price is $16.20 ÷ 5 = $3.24 per pound.

Front

What is the ratio of school apps to game apps if Kelly has 5 school apps and 3 game apps?

Back

The ratio of school apps to game apps is 5:3.

Front

If 4 out of every 5 seeds grow, how many seeds will grow if 40 seeds are planted?

Back

If 40 seeds are planted, then 32 seeds are expected to grow (40 x 4/5 = 32).

Front

What is the formula to calculate the number of days needed to complete a task at a constant rate?

Back

The formula is: Number of days = Total amount needed ÷ Rate of work per day.

Front

If Mrs. Campbell knits 3 inches of a scarf per day, how many days will it take her to knit 24 inches?

Back

It will take her 8 days to knit 24 inches (24 ÷ 3 = 8).

Front

What does it mean to compare ratios?

Back

Comparing ratios involves determining which of two or more ratios is larger, smaller, or if they are equivalent.