Thirty-six percent of Americans admit to often saying they can't do math. Among Americans aged 18 to 35, it's a whopping 53 percent. How many Americans would freely admit that they can't read? It's very uncool to be illiterate, but it's still socially acceptable to be innumerate.
Source: Change the Equation survey conducted online in September 2010. The study reached a national sample of 1,000 American adults ages 18 and older. The margin of error for the total sample is ±3% at the 95% confidence level. This means that if we were to replicate the study, we would expect to get the same results (within 3 percentage points) 95 times out of 100.