I’d bet the larger percentage is a certain group
This is true, from more than one aspect, in fact many aspects.
The percentage of men that are overwieght is higher then the percentage of women that are overweight.
It's even true from a political perspective.
A wealth of evidence right down to the county level, including BMI and lifestyle choices, shows that Republicans are more obese than Democrats.
There are more distictions too.
African American women, as a subgroup, have the highest rates of being overwieght and obesity.
Definitions of obesity can vary, but a BMU greater than like 30 is used in studies.
With so many people overwight in general, you can break it down many ways, among all kinds of groups.