Percent Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

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 the formula for finding a percent of a number?

Back

The formula is: Percent of a number = (Percent / 100) * Number.

Front

If 25% of a number is 50, what is the number?

Back

The number is 200, because 50 = (25/100) * Number.

Front

What does it mean to find the percent increase?

Back

Percent increase measures how much a quantity has grown relative to its original amount, calculated as: ((New Value - Original Value) / Original Value) * 100.

Front

What does it mean to find the percent decrease?

Back

Percent decrease measures how much a quantity has shrunk relative to its original amount, calculated as: ((Original Value - New Value) / Original Value) * 100.

Front

How do you find the total amount if you know the percent and the part?

Back

Total Amount = Part / (Percent / 100).

Front

What is a proportion?

Back

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

Front

How can you set up a proportion to solve for an unknown?

Back

You can set up a proportion by creating a ratio from the known values and setting it equal to a ratio that includes the unknown.

Front

What is the relationship between percent and decimals?

Back

To convert a percent to a decimal, divide by 100. For example, 25% = 0.25.