[Natural Law]

"I'd guess that percentage to be 40-60% or more."

"...but I'd hazard a guess of 25-50%"

" I'd guess that's true for 50-85% or so. "

"I'd guess that 15-25%"

"I would guesstimate that less than 20%"

Guess - To assume, presume, or assert (a fact) without sufficient information or qualifications.

[OLD REGGIE]

"I'd guess that percentage to be 40-60% or more."

"...but I'd hazard a guess of 25-50

" I'd guess that's true for 50-85% or so. "

"I'd guess that 15-25%"

"I would guesstimate that less than 20%"

Guess - To assume, presume, or assert (a fact) without sufficient information or qualifications.

Yah! The nerve of Quix to admit he "guessed". Make him eat crow. Provide the real numbers.