# Thread: percentages - I can't do this...

1. ## percentages - I can't do this...

OK, I'm buying a printer - I have been told that a printer toner cartridge has an average lifespan of 83,000 pages at 5% coverage per page.
I need to work out how many pages I will get out of this cartridge at 100% coverage.
This might be so simple, but my brain doesn't work that way..
Any help much appreciated!!!

2. Originally Posted by ames
OK, I'm buying a printer - I have been told that a printer toner cartridge has an average lifespan of 83,000 pages at 5% coverage per page.
I need to work out how many pages I will get out of this cartridge at 100% coverage.
This might be so simple, but my brain doesn't work that way..
Any help much appreciated!!!
Well 1 page with 100% coverage is the same as 20 pages with 5% coverage, assuming the pages are all identical in size!. So divide the number of pages by 20.

4150 pages.

3. ## you can see why I failed maths

Thanks for your help.. I was thinking something along the right lines, but in the wrong direction! thanx!