Unit 3 Review- Ratios, Rates, Proportions, Percents

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'.

Front

What is a rate?

Back

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

Front

What is a proportion?

Back

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

Front

What is a percent?

Back

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

Front

How do you find 50% of a number?

Back

To find 50% of a number, divide the number by 2.

Front

If Kelly ate 3 apples and that is 50% of the bag, how many apples were in the bag?

Back

6 apples.

Front

What is the ratio of boys to girls if there are 2 boys for every 3 girls?

Back

The ratio is 2:3.

Front

If there are 30 students in total and the ratio of boys to girls is 2:3, how many more girls are there than boys?

Back

There are 6 more girls than boys.

Front

How do you calculate 25% of a number?

Back

To calculate 25% of a number, multiply the number by 0.25.

Front

If Nelly spends 1 hour surfing the internet and that is 25% of her free time, how much free time does she have?

Back

4 hours of free time.