Percent of decrease 

Just like the name suggests, the percent of decrease is the amount of decrease out of one hundred.


Once we know what the decrease is, just divide the decrease by the original amount and express the answer as a percent.

Thus, the formula to use is : Amount of decrease / Original amount

I will illustrate what I just said with examples.

Example #1:

Find the percent of decrease from 6 to 4.

Amount of decrease is 6 − 4 = 2

Original amount is 6

2 / 6 = 0.3333

multiply 0.3333 by one hundred to get the answer as a percent.

0.3333 × 100 = 33.33, so the answer is 33.33%.

Example #2:

Find the amount of decrease per hundred from 10 to 5.

Amount of decrease is 10 − 5 = 5

Original amount is 10

5 / 10 = 0.50

multiply 0.50 by one hundred to get the answer as a percent

0.50 × 100 = 50, so the answer is 50%.



Example #3

Find the amount of decrease per hundred from -4 to -8.

Amount of decrease is -4 − -8 = -4 + 8 = 4

Original amount is -4

4 / -4 = -1

multiply -1 by one hundred to get the answer as a percent

-1 × 100 = -100, so the answer is -100%.





Recent Articles

  1. Conjugate in Algebra

    Oct 16, 17 09:34 AM

    What is the conjugate in algebra? A concise and clear explanation.

    Read More

New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

            Follow me on Pinterest


Page copy protected against web site content infringement by Copyscape





Recent Lessons

  1. Conjugate in Algebra

    Oct 16, 17 09:34 AM

    What is the conjugate in algebra? A concise and clear explanation.

    Read More

  Our Top Pages

Formula for percentage

Compatible numbers

Basic math test

Basic math formulas

Types of angles

Math problem solver

Algebra word problems

Surface area of a cube

Finding the average 

Scale drawings

Tough Algebra Word Problems.

If you can solve these problems with no help, you must be a genius!


Everything you need to prepare for an important exam!

K-12 tests, GED math test, basic math tests, geometry tests, algebra tests. 


Real Life Math Skills

Learn about investing money, budgeting your money, paying taxes, mortgage loans, and even the math involved in playing baseball.

 Recommended

Scientific Notation Quiz

Types of Angles Quiz

Graphing Slope Quiz

Adding and Subtracting Matrices Quiz  

Factoring Trinomials Quiz 

Solving Absolute Value Equations Quiz  

Order of Operations Quiz