Cost is much more relevant than number of people. If 10% is a number than it will likely be total cost or payroll cost. So you can lay off quantity 5 $60,000 employees or one manager being grossly overpaid at $300,000. NOV hasn't been very effective at the latter it would seem.
It would be great if this was the system used. But the thing is, when layoffs are happening, those five people will be the ones let go because the overpaid manager has somebody who has his back. Because it's the same thing each time, those doing the work get laid off, while those who are the true drain on NOV resources remain. If only it was merit based, but it's not, and it never will be...