Reducing overall width and weight effects

[T Folts]

Here is the scenario and I need some input please.
I need to scale down a bow for a gift for a good friend who lost a son recently. He was very involved in helping young ones shoot the bow so I wanted to make a bow that kids could shoot. So here is the question.
If I have a 60" bow that is 1.400" wide at the riser and .600 wide at the tip and want to reduce the width to 1.200 at the rise and .400 at the tip, how much would I loose in weight. it it roughly a 14 to 15% reduction.
Thanks for any input.
Terry

[kennym]

Supposedly width reduction can be figured by the percentage of width. So you can take a percentage of the original weight with the numbers you have there.

I have narrowed bows but never kept much track on percentage, but guessing ,that will be close. Maybe not quite as much as the math indicates.

[Walt Francis]

My experience on 66/64”, deflex/reflex longbows,similar to Kenny‘s design: Going from 1.48” to 1.2” and keeping the tips at .40” reduces the poundage 4-5 pounds on a 60-65# bow.  A side note, the arrow speed stays the same or slightly increased with the drop in limb mass/weight, despite the decrease in draw weight.