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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 227 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  2. 2.A water tank holds 2000 litres. 5% of the water is used. How many litres are left?
  3. 3.A water tank holds 3620 litres. 25% of the water is used. How many litres are left?
  4. 4.A water tank holds 1460 litres. 20% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹2420. It goes up by 40%. What is the new price (in ₹)?
  6. 6.A shop sells 1520 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  7. 7.A water tank holds 240 litres. 5% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹3340 to ₹2505. By what percent did it come down?
  9. 9.The price of a bicycle is ₹3340. It goes up by 5%. What is the new price (in ₹)?
  10. 10.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  11. 11.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  12. 12.The price of a school bag changes from ₹1820 to ₹1638. By what percent did it come down?
  13. 13.A town has 1900 people. Its population grows by 20%. How many people live there now?
  14. 14.A water tank holds 1460 litres. 10% of the water is used. How many litres are left?
  15. 15.A water tank holds 280 litres. 20% of the water is used. How many litres are left?
  16. 16.A water tank holds 3700 litres. 30% of the water is used. How many litres are left?
  17. 17.A water tank holds 3080 litres. 15% of the water is used. How many litres are left?
  18. 18.A town has 4380 people. Its population grows by 15%. How many people live there now?
  19. 19.A shop sells 2740 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  20. 20.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹1480 to ₹1406. By what percent did it come down?
  22. 22.A shop sells 280 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  23. 23.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹4640 to ₹6960. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹2300 to ₹2185. By what percent did it come down?
  27. 27.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 720 litres. 25% of the water is used. How many litres are left?
  30. 30.A water tank holds 560 litres. 50% of the water is used. How many litres are left?
  31. 31.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹860 to ₹817. By what percent did it come down?
  33. 33.A water tank holds 4420 litres. 10% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹1900 to ₹1520. By what percent did it come down?
  35. 35.A water tank holds 4700 litres. 5% of the water is used. How many litres are left?
  36. 36.A town has 1680 people. Its population grows by 5%. How many people live there now?
  37. 37.A water tank holds 1280 litres. 25% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹2320. It goes up by 50%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹1960 to ₹980. By what percent did it come down?
  40. 40.A water tank holds 4180 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 6.25
  2. 1900
  3. 2715
  4. 1168
  5. 3388
  6. 1824
  7. 228
  8. 25
  9. 3507
  10. 12
  11. 62.5
  12. 10
  13. 2280
  14. 1314
  15. 224
  16. 2590
  17. 2618
  18. 5037
  19. 3562
  20. 8
  21. 5
  22. 420
  23. 15.5
  24. 24
  25. 50
  26. 5
  27. 23.5
  28. 49.5
  29. 540
  30. 280
  31. 95
  32. 5
  33. 3978
  34. 20
  35. 4465
  36. 1764
  37. 960
  38. 3480
  39. 50
  40. 3344

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