bearisgray

Divide the "new size" by the "old size"

Example:

You want the quilt to be 100 x 100 and the pattern says 72 x 72

(95 x 95) divided by (72 x 72) =

9025 divided by 5184 = 1.741 (round up to 1.75)


Multiply the fabric requirements given by the result to get the new requirements.

Example:

Fabric requirements:

Blue: 1-1/2 yards
Green: 1-1/4 yards

Change to decimals:

Blue: 1.5 x 1.75 = new requirement = 2.625 = 2-5/8
Green: 1.25 x 1.75 = new requirement = 2.1875 = get 2-1/4

If one wants to make the new item larger than the original, the result will be greater than 1.0
If one makes the new item smaller than the original, the result will be less than 1.0