Percentage Examples
Worked examples for common percentage calculations.
Example 1: What is 20% of 250?
(20 ÷ 100) × 250 = 0.2 × 250 = 50
Example 2: 45 is what percent of 180?
(45 ÷ 180) × 100 = 0.25 × 100 = 25%
Example 3: Percentage increase
Salary increased from 40,000 to 46,000. What is the percentage increase?
((46,000 − 40,000) ÷ 40,000) × 100 = (6,000 ÷ 40,000) × 100 = 15%
Example 4: Percentage decrease (discount)
Price reduced from 200 to 150. What is the percentage decrease?
((200 − 150) ÷ 200) × 100 = (50 ÷ 200) × 100 = 25%
Example 5: Add 18% tax to 1,000
Tax = 1,000 × (18 ÷ 100) = 180. Total = 1,000 + 180 = 1,180
Example 6: Marks percentage
Obtained: 85, 90, 78, 92. Max each: 100. Total obtained = 345, total max = 400.
Percentage = (345 ÷ 400) × 100 = 86.25%