Final answer:
Without specific budget data for each month, it is impossible to determine which month had greater fixed expenses after a budget change. Fixed expenses remain consistent, and a comparison is necessary to answer the question.
Step-by-step explanation:
To determine which month had the greater fixed expenses after a budget change, one would need specific information or data pertaining to the budget of each month. Fixed expenses are costs that do not change from month to month, such as rent, mortgage payments, car payments, insurance premiums, and certain utilities. Without the relevant financial information or a comparison of the fixed expenses for January, February, March, and April, it is impossible to accurately answer which of these months had the greater fixed expenses after a budget change. This question may be part of a larger context or set of data in a mathematics problem dealing with budgeting and expenses.