Percent Proportion

Front

What is Percent Proportion?

Back

Percent Proportion is a mathematical relationship that shows how a part relates to a whole in terms of percentage. 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 whole = part.

Front

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

Back

The number is 200. (50 = 25% of x; x = 50 / 0.25 = 200).

Front

What does it mean if a price is increased by 10%?

Back

It means the new price is 110% of the original price. To find the new price, multiply the original price by 1.10.

Front

How do you find the percentage increase?

Back

Percentage increase is found using the formula: ((new value - original 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 30% off, what is the sale price?

Back

The sale price is $28. (30% of $40 is $12; $40 - $12 = $28).

Front

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

Back

Percent is a ratio out of 100, fraction is a part of a whole, and decimal is a way to express fractions. To convert: percent to decimal, divide by 100; fraction to percent, multiply by 100.

Front

How do you calculate the percent of change?

Back

Percent of change is calculated using the formula: ((new value - old value) / old value) x 100.