Rates, Ratios, Proportions and Percents

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

Define a proportion.

Back

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

Tags

CCSS.7.RP.A.2B

Front

What is the formula to calculate a percentage?

Back

Percentage = (Part/Whole) x 100.

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.

Front

What does it mean to find the percent of a number?

Back

Finding the percent of a number involves calculating how much of that number corresponds to a given percentage.

Front

If a jacket costs $85 and is on sale for 40% off, how much do you pay?

Back

You pay $51.

Tags

CCSS.6.RP.A.3C

Front

What is the average rate of speed?

Back

Average rate of speed is calculated by dividing the total distance traveled by the total time taken.

Tags

CCSS.6.RP.A.3B

Front

If Jenny drives 265 miles in 5 hours, what is her average speed?

Back

Her average speed is 53 mph.

Tags

CCSS.6.RP.A.3B

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object or area that is proportionally reduced or enlarged.

Tags

CCSS.7.RP.A.2C

Front

If a parking lot is represented in a scale drawing, how do you find the actual dimensions?

Back

To find the actual dimensions, multiply the measurements in the drawing by the scale factor.

Tags

CCSS.7.RP.A.2C