Nobody knows what an 850% increase is, so please stop saying it Posted by samirelanduk on Tuesday June 23, 2020 @01:24PM from the samireland.com dept. https://samireland.com/writing/percent-increase/ ( 1 comment | 2 points | on HN )
Just be careful how you word it -- and I'm not sure "relative increase" adds any clarity.
"It's 9.5 times bigger than it used to be."