My mind does not compute these problems so could some one help me figure this, please.

I want to down size a 12" block pattern to a 10".

The first measures 4¼ X 4¼
second is 3 and 7/8 X 7¾
the third 3½ X 7

what would the changes be for these three?

Thank You!

i realy dont know why i looked it just confirms how number blind i am--well good luck with the answer there are some very cleaver people on this board

Show me the block layout; I am a visual person.

It depends on the block and how those pieces fit together.

One way to figure it out is to take off the seam allowances of 1/4" on each side (so 1/2") and then multiply it times 5/6 but it would really help to see the block. I think with those sizes there are multiple pieces and some may be triangles.

Are these dimensions with or without seam allowance?

Sorry, no help here. Those questions on the math test that read, "if you left New York at 9 and travelled to Boston, stayed for 2 hrs. and travelled to Florida...What time would you get there?" I actually answered one, "Who cares?" The only way I could figure out the block would be to draw out the original on graph paper and see if I could deduct 8 squares off of the pieces. (8 1/4 inch squares =2 inches?)

I, too am looking forward to seeing this answer. Sometimes I get a tablerunner pattern that is over 30 inche long and I wish I could downsize it to ake a shorter one. Wonder if there is a formula for all of this type of questions?

The pattern is from quilterscache..name "Chinese Puzzle" it does not mention the ¼" seam allowance in the cutting...not sure how to handle that.

The formula is to take the seam allowances off the original size of the pieces and then multiply those sizes by the amount you want the percentage of the original piece you want it. So if you have a pattern that is 100 x 100 and you want it 80 x 80, you want it to be 80% of the original size.

The problem is that these sizes don't always convert to nice even numbers. Ideally you'd try to find measurements that are easy to deal with.

For those that do not have EQ (I am a little jealous):
This link shows how to draft block sizes.

http://www.quilterscache.com/StartQu...tingseven.html