Ratios, Proportions, & Percent Review

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 write a ratio?

Back

Ratios can be written in three ways: using a colon (e.g., 3:4), as a fraction (e.g., 3/4), or with the word 'to' (e.g., 3 to 4).

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, you can cross-multiply and then divide to find the unknown value.

Front

What is a percent?

Back

A percent is a ratio that compares a number to 100, often used to express how much of something there is.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100.

Front

What is 30% of 60?

Back

18

Front

If Sally ate 3 pieces of pepperoni pizza and 1 slice of cheese pizza, what is the ratio of total pizza slices to pepperoni pizza slices?

Back

4:3

Front

What is the formula to find the total number of items over time?

Back

Total items = Rate of items per time unit × Number of time units.

Front

If Abdul saves $5 from his $12 allowance, what is the ratio of savings to spending?

Back

5:7