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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 733 · 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 ₹740 to ₹444. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹2980 to ₹2682. By what percent did it come down?
  3. 3.A water tank holds 1500 litres. 5% of the water is used. How many litres are left?
  4. 4.A water tank holds 1900 litres. 40% of the water is used. How many litres are left?
  5. 5.A water tank holds 2900 litres. 10% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹4180 to ₹2090. By what percent did it come down?
  7. 7.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  8. 8.A water tank holds 280 litres. 5% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹740 to ₹962. By what percent did it go up?
  10. 10.The price of a bicycle is ₹4180. It goes up by 5%. What is the new price (in ₹)?
  11. 11.A water tank holds 3240 litres. 25% of the water is used. How many litres are left?
  12. 12.A water tank holds 3980 litres. 20% of the water is used. How many litres are left?
  13. 13.A town has 2580 people. Its population grows by 5%. How many people live there now?
  14. 14.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  15. 15.The price of a bicycle is ₹660. It goes up by 10%. What is the new price (in ₹)?
  16. 16.A water tank holds 2080 litres. 40% of the water is used. How many litres are left?
  17. 17.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.A shop sells 4660 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  19. 19.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  20. 20.A water tank holds 840 litres. 40% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4600 to ₹4830. By what percent did it go up?
  22. 22.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 620 litres. 10% of the water is used. How many litres are left?
  24. 24.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 2860 litres. 50% of the water is used. How many litres are left?
  26. 26.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  27. 27.A water tank holds 4340 litres. 50% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹4780. It goes up by 50%. What is the new price (in ₹)?
  29. 29.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  30. 30.The price of a bicycle is ₹2420. It goes up by 30%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹1040 to ₹1092. By what percent did it go up?
  32. 32.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  33. 33.The price of a bicycle is ₹380. It goes up by 15%. What is the new price (in ₹)?
  34. 34.A water tank holds 1240 litres. 40% of the water is used. How many litres are left?
  35. 35.A water tank holds 4360 litres. 5% of the water is used. How many litres are left?
  36. 36.A water tank holds 1720 litres. 5% of the water is used. How many litres are left?
  37. 37.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  39. 39.A water tank holds 4940 litres. 30% of the water is used. How many litres are left?
  40. 40.A town has 3820 people. Its population grows by 15%. How many people live there now?

Answer key

  1. 40
  2. 10
  3. 1425
  4. 1140
  5. 2610
  6. 50
  7. 36.25
  8. 266
  9. 30
  10. 4389
  11. 2430
  12. 3184
  13. 2709
  14. 19
  15. 726
  16. 1248
  17. 43
  18. 5592
  19. 51
  20. 504
  21. 5
  22. 31.25
  23. 558
  24. 37.5
  25. 1430
  26. 26.5
  27. 2170
  28. 7170
  29. 26
  30. 3146
  31. 5
  32. 72.5
  33. 437
  34. 744
  35. 4142
  36. 1634
  37. 95
  38. 20
  39. 3458
  40. 4393

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