Ratios, rates, and percents 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.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

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 cost per item.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

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 convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the top number (numerator) by the bottom number (denominator) and then multiply by 100.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value (k) that relates two proportional quantities, often represented as y = kx.

Tags

CCSS.7.RP.A.2B

Front

If there are 4 forks and 5 spoons, what is the ratio of forks to spoons?

Back

The ratio of forks to spoons is 4:5.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a movie ticket costs $10 and you buy 3 tickets, what is the total cost?

Back

The total cost is $30.

Tags

CCSS.3.OA.A.3

Front

What does it mean for two rates to be equivalent?

Back

Two rates are equivalent if they represent the same relationship between quantities, meaning they simplify to the same value.

Tags

CCSS.6.RP.A.3A

Front

How can you tell if a graph is proportional?

Back

A graph is proportional if it passes through the origin (0,0) and forms a straight line.

Tags

CCSS.7.RP.A.2D

Front

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

Back

To find a percent of a number, multiply the number by the percent (as a decimal). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Tags

CCSS.6.RP.A.3C