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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 258 · 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.The price of a school bag changes from ₹520 to ₹728. By what percent did it go up?
  2. 2.A town has 860 people. Its population grows by 20%. How many people live there now?
  3. 3.A town has 4020 people. Its population grows by 10%. How many people live there now?
  4. 4.A water tank holds 520 litres. 30% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1200 to ₹720. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹3900 to ₹3510. By what percent did it come down?
  7. 7.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹4880 to ₹4148. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹3980 to ₹2388. By what percent did it come down?
  10. 10.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹2760 to ₹1932. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹4560 to ₹5016. By what percent did it go up?
  13. 13.A water tank holds 1500 litres. 15% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹1020 to ₹510. By what percent did it come down?
  15. 15.A water tank holds 3460 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹3400. It goes up by 10%. What is the new price (in ₹)?
  17. 17.A water tank holds 2840 litres. 50% of the water is used. How many litres are left?
  18. 18.A water tank holds 1420 litres. 5% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹1480 to ₹1628. By what percent did it go up?
  20. 20.A water tank holds 1500 litres. 5% of the water is used. How many litres are left?
  21. 21.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹480 to ₹528. By what percent did it go up?
  23. 23.A town has 3300 people. Its population grows by 5%. How many people live there now?
  24. 24.A water tank holds 3140 litres. 25% of the water is used. How many litres are left?
  25. 25.A water tank holds 3480 litres. 30% of the water is used. How many litres are left?
  26. 26.A town has 840 people. Its population grows by 5%. How many people live there now?
  27. 27.The price of a school bag changes from ₹2080 to ₹1040. By what percent did it come down?
  28. 28.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹4540 to ₹4313. By what percent did it come down?
  30. 30.A water tank holds 4840 litres. 10% of the water is used. How many litres are left?
  31. 31.A water tank holds 560 litres. 15% of the water is used. How many litres are left?
  32. 32.A town has 940 people. Its population grows by 10%. How many people live there now?
  33. 33.The price of a school bag changes from ₹1820 to ₹910. By what percent did it come down?
  34. 34.A town has 3520 people. Its population grows by 15%. How many people live there now?
  35. 35.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  36. 36.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  37. 37.A town has 1580 people. Its population grows by 25%. How many people live there now?
  38. 38.A shop sells 1520 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  39. 39.A water tank holds 2360 litres. 50% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹1660. It goes up by 25%. What is the new price (in ₹)?

Answer key

  1. 40
  2. 1032
  3. 4422
  4. 364
  5. 40
  6. 10
  7. 65
  8. 15
  9. 40
  10. 33.5
  11. 30
  12. 10
  13. 1275
  14. 50
  15. 3287
  16. 3740
  17. 1420
  18. 1349
  19. 10
  20. 1425
  21. 65
  22. 10
  23. 3465
  24. 2355
  25. 2436
  26. 882
  27. 50
  28. 18.75
  29. 5
  30. 4356
  31. 476
  32. 1034
  33. 50
  34. 4048
  35. 15.5
  36. 6.25
  37. 1975
  38. 1824
  39. 1180
  40. 2075

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