Mathematics contributes to decision-making processes by providing tools and techniques to analyze data, identify patterns, and make informed choices based on logic and evidence. Mathematical models and algorithms help in predicting outcomes, optimizing solutions, and quantifying risks, which are essential components of effective decision-making in various fields such as finance, engineering, statistics, and economics. By using mathematical methods, decision-makers can evaluate different options, compare outcomes, and ultimately make decisions that are based on sound reasoning and calculations.