What is percentage of human calories from wheat corn and soy?

Wheat, corn, and soybeans collectively account for a significant portion of human calorie intake. Estimates suggest that these three crops provide around 50-70% of the calories consumed globally, with corn and wheat being the most prominent contributors. Specifically, wheat contributes approximately 20% of human calories, while corn provides about 25%, and soybeans contribute a smaller fraction, primarily through processed products. These figures can vary based on regional diets and agricultural practices.