Private practice lawyers must understand mathematics well enough to run a business. They must also be able to track and account for funds deposited in their clients' trust fund accounts. Attorneys must be able to add, subtract, multiply, and divide to calculate damages, pretrial interest, and time value of money. One of the most common ways that lawyers use mathematics is percentages.

For example, many need to figure out what the odds are that they will win a test. Divorce lawyers especially use percentages when it comes to deciding which assets go to which spouse. Settlements are another way that lawyers use percentages to ensure that their client receives fair compensation for the actions of others. Lawyers use mathematical skills, such as problem solving and logic in their regular business exercises.

Like a mathematical problem, lawyers in court need to gradually outline their knowledge of the case. While no specific type of mathematics is used to practice law, lawyers should be experts in problem solving and logical reasoning. Law schools really value potential students who have a degree in mathematics or something similar because of their logic and problem-solving skills.