Ratio and Percent Flashcard

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 the result by 100.

Front

What is 50% of a number?

Back

50% of a number is half of that number.

Front

How do you find the percent of a quantity?

Back

To find the percent of a quantity, multiply the quantity by the percent (as a decimal). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

What does it mean if a number is 75% of another number?

Back

It means that the number is three-quarters of the other number.

Front

How do you express 25% as a fraction?

Back

25% can be expressed as the fraction 1/4.

Front

What is the formula to calculate percent change?

Back

Percent change = (New Value - Old Value) / Old Value * 100.

Front

What is a proportion?

Back

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

Front

How do you solve for a missing value in a proportion?

Back

Cross-multiply the known values and then divide to find the missing value.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.