the american psychological association (2013) estimates that between and percent of youth across ages and cultures have specific learning disorders.

5; 15

Explanation:

A specific learning disorder refers to a neurodevelopmental ailment that starts throughout school-age, although it´s often not recognized until adulthood.

The APA has stated that around 5 to 15 percent of school-age kids have specific learning disorders, and in 80 percent of those cases, they are dealing with dyslexia. The third part of them is estimated to additionally have attention-deficit hyperactivity disorder (ADHD).

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