## Percentage Decrease of Integers

#### Aligned To Common Core Standard:

**Grade 7 Ratios** - 7.RP.A.3

How to Determine the Percentage Decrease of Integers - Finding the percentage is one of the simplest mathematical tasks. 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. 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. 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. These lessons and worksheets teach students how to calculate the percentage decrease found between two values.

### Printable Worksheets And Lessons

- 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.

#### 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. Bas 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?