About this worksheet
Each sheet contains 20, 24 or 32 problems (your choice) and is generated at random. Press “New problems” as many times as you like; there is no limit and no account needed.
Worked example
1228=
- Find the greatest common factor of 12 and 28: it is 4.
- Divide both by 4: 12 ÷ 4 = 3 and 28 ÷ 4 = 7.
- 12/28 = 3/7, and 3 and 7 have no common factor left.
Answer: 3/7
Teaching tips
- Divide by small common factors (2, 3, 5) repeatedly if the GCF is not obvious.
How to print or save as PDF
- Choose the options on the left (on a phone, above the preview).
- Press Print / Save as PDF.
- In the print window, pick your printer, or choose “Save as PDF” as the destination.
Only the worksheet and its answer key are printed; menus and buttons are hidden automatically.