We do not only use 10% of our brain.

[nolabels]

68. I read it another way from the article

It was written in the article
(snip)
Although there's no definitive culprit to pin the blame on for starting this legend, the notion has been linked to the American psychologist and author William James, who argued in The Energies of Men that "We are making use of only a small part of our possible mental and physical resources."
(snip)

Yet it would seem technically correct for a much lower percentage, for later is this snippet
(snip)
Another mystery hidden within our crinkled cortices is that out of all the brain's cells, only 10 percent are neurons; the other 90 percent are glial cells, which encapsulate and support neurons, but whose function remains largely unknown.
(snip)

Glial are support cells and are not actively involved neural responses -90%

To me, it would seem more correct would be closer to the 3-5% everyone likes to pass around, or maybe lower, after all it takes one to send and one to receive to complete the connection. Really to me what does matter anyway, it all works quite splendidly most of the time.
Would also like try to echo what I've always heard in decades involved in the repair trades, never try to fix something that is working as well and as planned