Thanks Joy, The last part, which I would call arithmetic, I can understand. I'm not going to say how long it is since I studied maths but suffice it to say that it is so long ago I've forgotten what it was about. I managed O grade maths, (algebra, geometry, trigonometry) sat at 16, and that was my lot. Without that, though, I wouldn't have got into university as all my other subjects were languages, history and literature. Simple arithmetic I was always good at which is why I understand some of your explanation. You are a good teacher!
Patricia >> I have a magazine with patterns printed at 50% and 75% >> of full size. What size do I need to set a photocopier >> to get 100% of pattern size? It's ninth-grade algebra: (If the word "algebra" gives you brain-freeze, just read the part between dashed lines.) Let P be the percent by which the pattern in the publication has been enlarged or reduced. Let C be the percent at which you need to set your copier. Then P times C equals 100%: PC = 1 Divide both sides of the equation by P: C = 1/P --------------------------------------------------------- That is, you need to set the copier for the inverse of the change that you want to undo. --------------------------------------------------------- You can punch "1 divide P equals" on your calculator, but if the percentage happens to be a common fraction, you can just turn it upside down. 50% is 1/2, so to undo it, you use 2, which is 200%. (Remember that "per cent" means "divide by one hundred".) 75% is 3/4, so you would use 4/3, which is one and a third: 133.33% -- Joy Beeson http://wlweather.net/PAGEJOY/ west of Fort Wayne, Indiana, U.S.A. To unsubscribe send email to [email protected] containing the line: unsubscribe lace-chat [email protected]. For help, write to [email protected]. Photo site: http://www.flickr.com/photos/lacemaker/sets/ To unsubscribe send email to [email protected] containing the line: unsubscribe lace-chat [email protected]. For help, write to [email protected]. Photo site: http://www.flickr.com/photos/lacemaker/sets/
