The Fibonnaci sequence doesn't really apply to the bone saving ability.
6.25% and 12.5% don't add up to 25%; 25% and 12.5% don't add up to the side's 50%, etc.
Fibonnaci - the two small numbers add up to the side's. —The preceding unsigned comment was added by Mike-south (talk) on 15:29, 22 June 2018 (UTC).