# Percentage Decrease of Integers

Just about all math teachers have to explain to students why they are learning something or other. Because it is very unclear to students why something applies to their life. This particular topic we explore here is definitely not something that needs explaining. We calculate the percentage that something decreases to understanding how something is doing. If something loses value, we intrinsically what to know and quantify how much value it has lost. We could want to know this for many different reasons. It could be because we have to understand how poorly we are doing. It could also help us understand the sale price of something. These lessons and worksheets teach students how to calculate the percentage decrease found between two values.

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

- Step By Step Lesson- Bobby the T-Rex is one hungry dinosaur.
- Guided Lesson - As you read on, it is no wonder why Joe drinks all that coffee.
- Guided Lesson Explanation - This is common work place math for you.
- Worksheet 1 - Pick apart the integers that you are given.
- Worksheet 2 - Some problems we have seen use tape diagrams here for this one too.

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

### Homework Sheets

See if the values can be formed using three different methods.

- Homework 1 - 4 is what % less than 80?
- Homework 2 - The equation that we use for percentage decrease is: difference of values/ larger value x 100%
- Homework 3 - For all of the problems we need to determine the percentage decrease.

### Practice Worksheets

You can calculate the difference in your test scores when they decrease using this method. Make good use of the example!

- Practice 1 - This is normally a three step problem.
- Practice 2 - There are a couple of different ways you can approach these.
- Practice 3 - What would you do to find the decrease?

### Math Skill Quizzes

Using the percentage increase always elevates my moods.

### How to Determine a Percentage Decrease

There are very few skills that we are taught in school that will have an impact in our lives. This is one of them. This can help you understand how much of a deal you are receiving at a department store sale. It can also help you gauge how much less efficient something has or will become overtime. This is a topic that talks right towards production and progress which helps you access trends and make decisions to either speed this variable up or down, depending on your situation. Finding percentage change is a concept that people use in their daily lives. It helps in calculating the change rates of change in various quantities.

Finding a shift in percentage is one of the simplest mathematical tasks, as long as you have everything you need in order to gauge it. All you need is the total amount and the amount consumed/obtained/left. You can then use the following formula to determine the percentage.

(Amount of left or obtained or consumed) / (Total amount) × 100

It can also be restated as: Percentage Decrease = Decrease ÷ Original Value x 100

**How to Calculate It** - To calculate the percentage decrease, you will need the original value and the new value. You have to find the difference between them. After you find the difference, you divide it by the original value and multiply it by 100.

The formula to calculate the percentage decrease of value, you can use the following formula.

Percentage decrease = (Original value-new value) / (Original value) × 100.