Ratio, Rate, and Percent 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 as 'a to b' or a:b.

Front

How do you calculate a rate?

Back

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

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100, denoted by the symbol '%'. For example, 50% means 50 out of 100.

Front

If 5 liters of Yoda Soda are needed for 12 guests, how many liters are needed for 36 guests?

Back

15 liters.

Front

What is the ratio of red apples to green apples in a basket containing 3 red apples and 1 green apple?

Back

The ratio is 3:1.

Front

If an elephant eats 5% of its body weight and consumes 300 pounds of food, how do you find its weight?

Back

To find the weight, divide the amount of food eaten by the percentage it represents: 300 lbs ÷ 0.05 = 6,000 lbs.

Front

What is the ratio of salty snacks to sweet snacks if there are 15 salty snacks and 7 sweet snacks?

Back

The ratio is 15:7.

Front

How do you find the cost per gallon if a 10-gallon tank costs $102.20?

Back

Divide the total cost by the number of gallons: $102.20 ÷ 10 = $10.22 per gallon.

Front

What does it mean to find a unit rate?

Back

A unit rate is a rate in which the second quantity is 1. For example, if a car travels 300 miles in 5 hours, the unit rate is 60 miles per hour.

Front

How can you express the ratio of 12 to 4 in simplest form?

Back

The simplest form of the ratio 12:4 is 3:1.