Ratios and Percents

Front

What is a ratio?

Back

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

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 the result by 100.

Front

What is the formula for calculating percentage?

Back

Percentage = (Part / Whole) x 100.

Front

If 65% of a group are males, what fraction represents the males?

Back

The fraction representing the males is 65/100 or simplified to 13/20.

Front

What does it mean if a percentage is greater than 100%?

Back

A percentage greater than 100% indicates that the part is larger than the whole.

Front

How do you find the percentage of a number?

Back

To find the percentage of a number, multiply the number by the percentage (as a decimal). For example, to find 25% of 200, calculate 200 x 0.25 = 50.

Front

What is a common way to express a ratio?

Back

A common way to express a ratio is using a colon, for example, 3:2.

Front

How do you express 50% as a fraction?

Back

50% can be expressed as the fraction 1/2.

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions state that two ratios are equal.

Front

If 20% of students passed an exam, how many failed?

Back

If 20% passed, then 80% failed.