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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 49 · 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 water tank holds 2600 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹3080 to ₹2156. By what percent did it come down?
  3. 3.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 2860 litres. 20% of the water is used. How many litres are left?
  5. 5.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  6. 6.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  7. 7.A water tank holds 1840 litres. 20% of the water is used. How many litres are left?
  8. 8.A water tank holds 2060 litres. 30% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹1120 to ₹952. By what percent did it come down?
  10. 10.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  11. 11.A water tank holds 2860 litres. 30% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹4280. It goes up by 25%. What is the new price (in ₹)?
  13. 13.A water tank holds 1600 litres. 40% of the water is used. How many litres are left?
  14. 14.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  15. 15.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹2300 to ₹2185. By what percent did it come down?
  17. 17.The price of a bicycle is ₹2320. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹4860 to ₹6804. By what percent did it go up?
  19. 19.The price of a bicycle is ₹2840. It goes up by 50%. What is the new price (in ₹)?
  20. 20.A water tank holds 3420 litres. 5% of the water is used. How many litres are left?
  21. 21.A water tank holds 3080 litres. 25% of the water is used. How many litres are left?
  22. 22.A shop sells 1280 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  23. 23.A town has 3820 people. Its population grows by 40%. How many people live there now?
  24. 24.The price of a school bag changes from ₹4860 to ₹3402. By what percent did it come down?
  25. 25.A water tank holds 4200 litres. 20% of the water is used. How many litres are left?
  26. 26.A water tank holds 1060 litres. 30% of the water is used. How many litres are left?
  27. 27.A water tank holds 4260 litres. 25% of the water is used. How many litres are left?
  28. 28.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 260 litres. 5% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹3200 to ₹2240. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹4320 to ₹4752. By what percent did it go up?
  32. 32.A water tank holds 580 litres. 10% of the water is used. How many litres are left?
  33. 33.A town has 360 people. Its population grows by 5%. How many people live there now?
  34. 34.The price of a school bag changes from ₹3100 to ₹2945. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹2720 to ₹2856. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹1420 to ₹1491. By what percent did it go up?
  37. 37.A town has 4640 people. Its population grows by 25%. How many people live there now?
  38. 38.A town has 4900 people. Its population grows by 15%. How many people live there now?
  39. 39.The price of a school bag changes from ₹2340 to ₹1989. By what percent did it come down?
  40. 40.A shop sells 320 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?

Answer key

  1. 1560
  2. 30
  3. 38
  4. 2288
  5. 12
  6. 47.5
  7. 1472
  8. 1442
  9. 15
  10. 35
  11. 2002
  12. 5350
  13. 960
  14. 37.5
  15. 37.5
  16. 5
  17. 2668
  18. 40
  19. 4260
  20. 3249
  21. 2310
  22. 1344
  23. 5348
  24. 30
  25. 3360
  26. 742
  27. 3195
  28. 36.5
  29. 247
  30. 30
  31. 10
  32. 522
  33. 378
  34. 5
  35. 5
  36. 5
  37. 5800
  38. 5635
  39. 15
  40. 400

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