Percent Proportion

Front

What is Percent Proportion?

Back

Percent Proportion is a mathematical relationship that compares a part to a whole using percentages. It is often expressed as: part/whole = percent/100.

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 finding the percent of a number?

Back

The formula for finding the percent of a number is: (percent/100) x total = part.

Front

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

Back

To find the number, use the formula: part = (percent/100) x total. Here, 50 = (25/100) x total. Therefore, total = 50 / (25/100) = 200.

Front

What does it mean if a price is marked down by 20%?

Back

A price marked down by 20% means that the new price is 80% of the original price. You can find the new price by multiplying the original price by 0.80.

Front

How do you find the percent increase?

Back

To find the percent increase, use the formula: ((new value - original value) / original value) x 100.

Front

What is a percent decrease?

Back

A percent decrease is a reduction in value expressed as a percentage of the original value. It is calculated using the formula: ((original value - new value) / original value) x 100.

Front

If a shirt costs $40 and is on sale for $30, what is the percent decrease?

Back

Percent decrease = ((40 - 30) / 40) x 100 = (10 / 40) x 100 = 25%.

Front

What is the relationship between fractions, decimals, and percentages?

Back

Fractions, decimals, and percentages are different ways to represent the same value. For example, 1/2 = 0.5 = 50%.

Front

How do you solve a percent proportion problem?

Back

To solve a percent proportion problem, set up the equation part/whole = percent/100 and solve for the unknown.