A simple total balance owed divided by total credit limit. (debtkid.com)
Use money borrowed (up to available total credit limit) for any purpose * — consolidate debt, invest, fund a child's education, renovate a home or take a vacation. (mcap.com)
But I would emphasize: this is significant only because I have no negatives on my report, a very high total credit limit, and a long history. (money.stackexchange.com)