Flashcardizz: Unit Review: Percents

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 calculate the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (as a decimal). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

What is simple interest?

Back

Simple interest is calculated using the formula: Interest = Principal x Rate x Time.

Front

If a student scores 45 out of 60 on a test, what is their percent grade?

Back

75% (calculated as (45/60) * 100).

Front

What is the formula for calculating percent error?

Back

Percent Error = |(Estimated Value - Actual Value)| / Actual Value x 100.

Front

How do you find the total number of items if you know the percent?

Back

If you know the percent and the number of items that represent that percent, use the formula: Total = Part / (Percent as a decimal).

Front

What is the relationship between fractions and percents?

Back

Fractions can be converted to percents by multiplying by 100. For example, 1/4 = 0.25 = 25%.

Front

How do you calculate the total amount after applying a percent increase?

Back

Total Amount = Original Amount + (Original Amount x Percent Increase as a decimal).

Front

What is a proportion?

Back

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

Front

If a product is on sale for 20% off, how do you find the sale price?

Back

Sale Price = Original Price - (Original Price x 0.20).