# Adding and Subtracting Percentages Worksheets

You really cannot explore the concept of operations with percentages without understanding how they relate to decimal values. This is often the first step we will be taking with working with these problems. I would highly suggest you revisit that topic before proceeding further, if you have any difficulty at all with the lesson and guided portion that is found below. This section features a series of worksheets and lessons that show students find sums and differences of percentages and decimals. You will find this a very valuable skill when consider anything in the retail industry regardless if you are buying or selling products.

### Aligned Standard: 7.RP.A.3

- Difference Operations with Percentages Lesson- Darn Iggy is always losing soccer balls because of his powerful kick.
- Guided Lesson - We take a shot some of your routine problems and see where we get with them.
- Guided Lesson Explanation - They are basically two line explanations.
- Adding & Subtracting Common Percents Worksheet - Some of the most commonly used percentage differences and sums for you.
- Mix-Matched Problems - A true Potpourri of math problems that include percentages or decimals for you.

- Answer Keys - These are for all the unlocked materials above.

### Homework Sheets

At some point we even ask you to create your own problems. That is super hard, at first.

- Homework 1 - Solve each math problem. Round your answer to the nearest hundredth.
- Homework 2 - The team started the year with 64 soccer balls. Throughout the season Iggy powerful shots resulted in the team losing 25% of their soccer balls.
- Homework 3 - Subtracting Percents & Decimals

### Practice Worksheets

Time to get plenty of repetitions with your more common daily use of this skill.

- Practice 1 - Math with Percents & Decimals
- Practice 2 - Solve each problem. Don't forget to put the correct labels in the answers ($).
- Practice 3 - Fill in the blanks to create your own math problems. Switch with a partner and see if they can figure it out!

### Math Skill Quizzes

It's time to put that practice to use.

- Quiz 1 - Solve each problem. Then, list the answers in order from least to greatest.
- Quiz 2 - Adding Percents & Decimals

### Tips for Adding and Subtracting Percentages

Before you get started with the addition and subtraction of percentages and decimals, keep in mind that you should have clear concepts about what they actually are Keep in mind that the percent are a percentage or a proportion of a number. For example, the 10% of 240 is 24. And a decimal number is a number with a point/decimal in between in it. You can easily relate the two forms because the value 1 is equal to 100%. This would mean that if move the decimal point one place to the left and create 0.1, that would be equal to 10%.

Well, this is easy. But what when you get to add or subtract these percent and decimals? In this guide, we share with you a few tips for adding and subtracting percent and decimals. Make sure to read the problem or equation thoroughly.

Taking a percentage of a number is easy, if you understand the decimal value of that percentage. For example, you have an equation to solve such, x = 22.64 + 10%. What is the value of x?

First, convert the 10% into a decimal number based on the root value. The percentage becomes 0.1. 0.1 x 22.64 is the same thing as moving the decimal one place to the left or 2.264. So the problem can now be rewritten as:

x = 22.64 + 2.264

Now, you have both the numbers in the decimal form, and they are ready to be added. Place one decimal number under the other and make sure the decimal falls in line. Now add the two number and round off the answer. The same method is applicable for problems with subtraction. In case you were wondering x = 24.904.