Worksheets · Pre-Algebra

Pre-Algebra percent of change worksheet

Two kinds of question. The first gives two values and asks for the percent of change between them, which is the difference over the original, and the answer says whether it went up or down. The second gives a number and a percent and asks for the result. Easy lands on whole numbers; hard uses eighths like 12.5%, which are the ones that catch people out.

Select your difficulty

Pick more than one for a sheet that mixes them.

Free math worksheets at sigmaprep.io/worksheets© 2026 Sigma Prep

Sigma Prep · sigmaprep.io/worksheets

Name

Percent of Change

Date Period

Find each percent of change, or each result.

  1. Find the percent of change from 10 to 5
  2. 200 increased by 50%
  3. Find the percent of change from 60 to 90
  4. 100 increased by 50%
  5. Find the percent of change from 200 to 220
  6. 110 increased by 10%
  7. Find the percent of change from 175 to 210
  8. 20 increased by 10%
  9. Find the percent of change from 140 to 175
  10. 140 decreased by 10%
  11. Find the percent of change from 20 to 10
  12. 160 decreased by 20%
  13. Find the percent of change from 100 to 120
  14. 150 decreased by 10%
  15. Find the percent of change from 150 to 165
  16. 180 increased by 25%
  17. Find the percent of change from 30 to 60
  18. 70 decreased by 20%
  19. Find the percent of change from 40 to 80
  20. 40 increased by 25%

Free math worksheets at sigmaprep.io/worksheets© 2026 Sigma Prep

Sigma Prep · sigmaprep.io/worksheets

Name

Percent of ChangeAnswer keyVersion 1

Date Period

Find each percent of change, or each result.

  1. Find the percent of change from 10 to 550% decrease
  2. 200 increased by 50%300
  3. Find the percent of change from 60 to 9050% increase
  4. 100 increased by 50%150
  5. Find the percent of change from 200 to 22010% increase
  6. 110 increased by 10%121
  7. Find the percent of change from 175 to 21020% increase
  8. 20 increased by 10%22
  9. Find the percent of change from 140 to 17525% increase
  10. 140 decreased by 10%126
  11. Find the percent of change from 20 to 1050% decrease
  12. 160 decreased by 20%128
  13. Find the percent of change from 100 to 12020% increase
  14. 150 decreased by 10%135
  15. Find the percent of change from 150 to 16510% increase
  16. 180 increased by 25%225
  17. Find the percent of change from 30 to 60100% increase
  18. 70 decreased by 20%56
  19. Find the percent of change from 40 to 80100% increase
  20. 40 increased by 25%50

Free math worksheets at sigmaprep.io/worksheets© 2026 Sigma Prep

How to do these

80 increased by 25%

  1. 25% of 80 is 20.
  2. Increased means add it on.

The answer is 100.

Where students go wrong

Taking the percent of the wrong number, or thinking a 20% rise then a 20% fall returns you to the start. It does not: the fall is 20% of a bigger number, so you end up lower than you began.

Also called percent increase, percent decrease or percentage change.

What you can put on this worksheet

Find the percent of change between two values
Find the percent of change from 100 to 75 25% decrease
Increase or decrease a number by a percent
120 decreased by 25% 90

Questions about these worksheets

Yes. Every percent of change sheet is free to print and free to download as a PDF. There is no account to make, no email to hand over and no limit on how many you take.

Yes. The answer key prints on a second page, and you can choose whether it shows each question beside its answer or just the answers in a list.

Yes. Print straight from the page, or download the PDF and print that. The sheet is laid out for paper rather than squeezed off a screen, so there is room to work under each question, and the answer key comes out on its own page.

Pre-Algebra is usually taken around 7th or 8th grade, though schools vary and plenty of students meet it earlier or later. Pick the difficulty rather than the grade: the easy level suits a first lesson on it, the hard level suits review before a test.

Yes, as many as you like. The questions are built fresh each time rather than picked from a fixed set of files, so pressing Generate gives a new sheet. That is what you want for a second class, a retake, or two students sitting next to each other.

That is the closest comparison, and Kuta Software is good software. It is also paid software you install on a computer. These worksheets run in a browser tab for free, with no account and nothing to install. Like Kuta, the percent of change questions are generated when you ask for them rather than pulled from a fixed set of files, so two classes never get the same sheet, and the answer key comes with it.

Yes. There are three levels, and you can tick more than one for a sheet that mixes them, in which case the questions come out easiest first. The harder levels are not just larger numbers: they ask for something the easy ones do not.

You pick from 2: find the percent of change between two values and increase or decrease a number by a percent. Tick as many as you want and set how many of each, or let it spread them evenly.

Taking the percent of the wrong number, or thinking a 20% rise then a 20% fall returns you to the start. It does not: the fall is 20% of a bigger number, so you end up lower than you began.