Unit 2 Review-Rates, Ratios, & 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

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, 20% of 50 is 50 * 0.20 = 10.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit of another quantity.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and then multiply by 100. For example, 1/4 = 0.25 = 25%.

Front

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

Back

The formula is: Percent = (Part/Whole) * 100.

Front

What does it mean to find the missing value in a proportion?

Back

Finding the missing value in a proportion involves setting up a ratio that compares two equivalent fractions and solving for the unknown.

Front

What is 50% of 100?

Back

50% of 100 is 50.

Front

If a meal costs $40 and you leave a 15% tip, how much is the tip?

Back

The tip is $6.00 (40 * 0.15 = 6).

Front

What is the ratio of 3 apples to 5 oranges?

Back

The ratio is 3 to 5.

Front

How do you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms of the ratio by their greatest common divisor.