Applescript Illustrator scale art to returned dialog - applescript

Question

The first part of this script finds the art size and returns with the size in inches -
I want this to then ask what size to make the width then enter the number and have Illustrator scale the art to the width in the returned dialog.
I'm trying to figure out where the calculation is off here.
It seemed at first the scale percentage would be correct but to enlarge the
percentage must be over 100 % (i.e. 125% or 150% etc.)
I can't get the script to compile with an else between my if's so I'm sure I'm missing something here.
tell application "Adobe Illustrator"
activate
tell document 1
--define Spot1
set docColorSpace to color space
if (docColorSpace is CMYK) then
set SpotColor1 to {cyan:21.0, magenta:0, yellow:100.0, black:0.0}
else
set SpotColor1 to {red:206.0, green:219.0, blue:41.0}
end if
--color change first
set (path items whose fill color is not SpotColor1)'s fill color to SpotColor1
--get current size
set tempGroup to make new group item with properties {name:"TempGroup"} -- Create a temporary container group
duplicate every page item to beginning of group item "TempGroup" -- copy instances to it
set {w, h} to {width, height} of tempGroup -- get properties
delete tempGroup
display dialog "Width of Art: " & (w / 72) & return & "Height of Art: " & (h / 72)
--change to desired size PROBLEM SECTION
set newWidth to text returned of (display dialog "Please enter Art Width:" default answer "100")
tell application "Adobe Illustrator"
set artWidth to width of tempGroup
set sizeDifference to (newWidth / artWidth) * 100
try
if newWidth is equal to artWidth then
set scalePercentage to 100
end if
if newWidth is greater than artWidth then
set scalePercentage to (100 + sizeDifference)
end if
if newWidth is less than artWidth then
set scalePercentage to (100 - sizeDifference)
end if
end tell
end
I appreciate any suggestions. I realize javascript is probably the way to go with Illustrator
but am trying to saw my way through understanding some applescripts before moving on to something more advanced. Thanks in advance.

Answer 1

I found the answer after playing with the math.
The problem was Illustrator doesn't deal with inches only points
hence the (w/72) (h/72) portion when it gets the size.
72 points = 1 inch so the math had to convert points to inches.
like so
tell application "Adobe Illustrator"
activate
tell document 1
--get current size
set tempGroup to make new group item with properties {name:"TempGroup"} -- Create a temporary container group
duplicate every page item to beginning of group item "TempGroup" -- copy instances to it
set {w, h} to {width, height} of tempGroup -- get properties
delete tempGroup
display dialog "Width of Art: " & (w / 72) & return & "Height of Art: " & (h / 72)
--resize
set newWidth to text returned of (display dialog "Please enter Art Width:" default answer "10")
set artWidth to width of tempGroup
set sum to (artWidth / newWidth * 100)
set scalePercentage to (72 / sum * 10000)
scale tempGroup horizontal scale scalePercentage vertical scale scalePercentage
end tell
end tell
end