Is it true that it's rare to have adhd without a learning disability?

They're linked: About a third of adhd have dyslexia. This is the most common disability. This also means that two-thirds don't have dyslexia. Dysgraphia also occurs, but i wouldn't say that it is rare to have adhd without any learning disabilities.

30% have LD: Of the children with ADHD, approximately 30% will ultimately develop symptoms of a learning disability separate from the difficulty focusing and paying attention. In many cases the learning disability may not be apparent until the children reach 3rd or 4th grade. Many children may be inattentive but not have ADHD.