DA = Basic Salary × DA Rate
DA = Basic Salary × (DA Percentage ÷ 100)
DA = Basic Salary + DA Amount
DA Amount = Basic Salary × DA Rate
DA Rate = DA Percentage ÷ 100
Example: Basic Salary = 20,000 and DA = 10%
DA Amount = 20,000 × 10 ÷ 100 = 2,000
Total Salary with DA = 20,000 + 2,000 = 22,000