Percents

Percents are used to communicate ideas to people everyday. All my lessons are designed to help you deeply explore the topic with real life applications.

You may have heard people say that they will give you a 5% discount if you purchase two T-shirts, or 5 pants.

Some jobs such as car sales pay based on a percentage of sales

If you have a saving account, the bank may give you a 3% interest every year.

Credit cards company charge high interest of 10% to 20% depending on your credit.

This unit will teach you many real life applications of the topic.

In the end, you should feel comfortable with the following topics: discount, sales tax, simple interest, commission, and tips.

A review of fractions and proportions may help you understand this unit.

Therefore, go back and review them if time permits.

Meaning of percent
Crystal clear explanation using tables

Formula for percentage
Use a good percentage formula to solve problem with the following format: x% of y is ?


Percent to decimal
Learn why 6% = 0.06


Decimal to percent
Learn why 0.24 = 24%


Percent of increase
Find out the percentage a quantity is increased by


Percent of decrease
Find out the percentage a quantity is decreased by


Greatest possible error
Definition and examples of the greatest possible error and a calculator to practice.


Finding the percentage
Learn the difference between base, rate and percentage. Then, use the base and the rate to find the percentage


Calculate sales tax
How how to compute sales tax


Mortgage loans
Learn to calculate your down payment, the amount of mortgage and the total interest


Price discount
Learn how to find the amount to pay after you have been given a discount


Simple interest
Learn to compute a simple interest when the principal is known