Unit 3A Ratios and Proportions Test

Front

What is a ratio?

Back

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

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply and then divide to find the unknown value.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant ratio or rate in a proportional relationship.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the quantity by the number of units to express it per one unit.

Front

What is the formula for finding the unit price?

Back

Unit Price = Total Price / Quantity.

Front

If 18/10 = x/12, what is x?

Back

x = 21.6.

Front

How many seconds are in one minute?

Back

There are 60 seconds in one minute.

Front

If Lucas's computer took 8 minutes to download 30 songs, how many seconds per song did it take?

Back

It took 16 seconds per song.