The phrase "actually less likely" is correct and usable in written English.
It can be used to indicate that something is not as probable as it may seem or has been suggested.
Example: "Despite the initial assumptions, the results showed that the event was actually less likely to occur than predicted."
Alternatives: "in fact, less probable" or "truly less likely".
This sounds like an obvious first step, but millennials are actually less likely than their older professional counterparts to open a 401(k) plan, even if their employer offers matching.
He found that articles that evoke sadness are actually less likely than the average piece to be passed on.
Furthermore, within poor states, people with low incomes are actually less likely to attend church than those with high incomes.
"When human beings are offered many choices, they're actually less likely to make a decision or selection," Jacoby says.
The FSB's latest survey showed that its members were actually less likely to hire new staff now than in late 2010.
James Westphal, a business professor at the University of Michigan, has found that professionally diverse boards are actually less likely to challenge the C.E.O.
In fact, our current employees under the age of 35 are actually less likely to leave the firm than their same age counterparts in years past.
Additionally, I believe decision-makers are actually less likely to be scared when they understand better what is at stake and what are the main drivers of this change.
Looking more closely, however, we find that this overall result masks a difference between different types of elites: those holding formal leadership positions are more likely to receive benefits, while informal leaders are actually less likely to.
After two months of treatment, at least some symptoms will remain for these individuals, and each subsequent medication tried is actually less likely to help than the one prior.
White's 1986 article in the journal Explorations in Economic History shows that if a retail bank owned a securities business it was actually less likely to fail in the Great Depression.
