Percent Proportion

Front

What is the formula to calculate a percentage of a number?

Back

To calculate a percentage of a number, use the formula: (Percentage / 100) * Total Number.

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 by 100.

Front

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

Back

Percentages, fractions, and decimals are different ways to represent the same value. A percentage is a fraction out of 100, a decimal is a fraction expressed in base 10.

Front

How do you find the original price if you know the discount and the sale price?

Back

To find the original price, use the formula: Original Price = Sale Price / (1 - Discount Rate).

Front

What does it mean to find 'x percent of y'?

Back

Finding 'x percent of y' means calculating (x / 100) * y.

Front

How do you calculate the percent increase or decrease?

Back

Percent increase = ((New Value - Original Value) / Original Value) * 100; Percent decrease = ((Original Value - New Value) / Original Value) * 100.

Front

What is the percent grade if a student scores 45 out of 60?

Back

Percent grade = (Score / Total Points) * 100 = (45 / 60) * 100 = 75%.

Front

If a product is marked down by 25% and the sale price is $75, what was the original price?

Back

Original Price = Sale Price / (1 - Discount Rate) = $75 / (1 - 0.25) = $100.

Front

What is the formula to calculate the part when given the whole and the percentage?

Back

Part = (Percentage / 100) * Whole.

Front

How do you express 15% as a decimal?

Back

To express 15% as a decimal, divide by 100: 15% = 0.15.