Ratios, Proportions, Decimals, 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 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 1/5 as a percent?

Back

20%.

Front

What is a proportion?

Back

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

Front

How do you find a percentage of a number?

Back

To find a percentage of a number, multiply the number by the percentage (in decimal form).

Front

What is 20% of 80?

Back

16.

Front

How do you calculate the total from a percentage?

Back

To calculate the total from a percentage, divide the part by the percentage (in decimal form).

Front

If a person earns $9 for mowing one lawn, how much do they earn for 5 lawns?

Back

$45.

Front

What is the formula for finding the percentage of a total?

Back

Percentage = (Part / Total) x 100.

Front

If there are 60 apples and 30% are sold, how many apples are sold?

Back

18 apples.