This article discusses the functions of finance and accounting departments, sources of finance, and ratio analysis in financial decision making. It covers topics such as internal and external sources of finance, accounting functions like financial accounting, management accounting, tax function, and auditing function, and finance functions like investment function, financing function, dividend function, and working capital function. The article also includes a ratio analysis of gross profit margin, operating profit margin, ROCE, current ratio, quick ratio, inventory turnover days, debtor’s collection period, and creditor’s payment period.