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 (%) = (Part/Whole) x 100.

Front

What does it mean to find the proportion of a number?

Back

Finding the proportion of a number means determining how much of that number is represented by a certain percentage.

Front

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

Back

The number is 200. (50 = 25% of 200, so 200 = 50 / 0.25)

Front

What is the relationship between percent, fraction, and decimal?

Back

A percent can be converted to a fraction by placing it over 100, and to a decimal by dividing by 100.

Front

How do you find the percent increase?

Back

Percent increase = ((New Value - Original Value) / Original Value) x 100.

Front

How do you find the percent decrease?

Back

Percent decrease = ((Original Value - New Value) / Original Value) x 100.

Front

What is a proportion?

Back

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

Front

If a shirt costs $40 and is on sale for 20% off, what is the sale price?

Back

The sale price is $32. (20% of $40 is $8, so $40 - $8 = $32)