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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 243 · 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 comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  2. 2.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  3. 3.A water tank holds 1980 litres. 5% of the water is used. How many litres are left?
  4. 4.A water tank holds 2540 litres. 25% of the water is used. How many litres are left?
  5. 5.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹4200 to ₹4830. By what percent did it go up?
  7. 7.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  8. 8.The price of a bicycle is ₹3180. It goes up by 5%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹4140 to ₹5382. By what percent did it go up?
  10. 10.A water tank holds 440 litres. 10% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹4920. It goes up by 5%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹880 to ₹1232. By what percent did it go up?
  13. 13.A shop sells 820 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  14. 14.The price of a bicycle is ₹1460. It goes up by 50%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹2640. It goes up by 20%. What is the new price (in ₹)?
  16. 16.The price of a bicycle is ₹2200. It goes up by 40%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹3160. It goes up by 30%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹3480 to ₹2610. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹2820 to ₹2397. By what percent did it come down?
  20. 20.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  21. 21.The price of a school bag changes from ₹1980 to ₹2277. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹1480 to ₹888. By what percent did it come down?
  23. 23.A water tank holds 3860 litres. 40% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹3120 to ₹2184. By what percent did it come down?
  25. 25.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 2120 litres. 30% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹2100 to ₹1890. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹820 to ₹615. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹2160 to ₹2484. By what percent did it go up?
  30. 30.A water tank holds 1080 litres. 20% of the water is used. How many litres are left?
  31. 31.A shop sells 2180 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  32. 32.A town has 2960 people. Its population grows by 5%. How many people live there now?
  33. 33.A water tank holds 2540 litres. 15% of the water is used. How many litres are left?
  34. 34.A water tank holds 3400 litres. 15% of the water is used. How many litres are left?
  35. 35.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  36. 36.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  37. 37.A town has 1880 people. Its population grows by 40%. How many people live there now?
  38. 38.The price of a bicycle is ₹2120. It goes up by 50%. What is the new price (in ₹)?
  39. 39.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 3980 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 55
  2. 57.5
  3. 1881
  4. 1905
  5. 72.5
  6. 15
  7. 49
  8. 3339
  9. 30
  10. 396
  11. 5166
  12. 40
  13. 861
  14. 2190
  15. 3168
  16. 3080
  17. 4108
  18. 25
  19. 15
  20. 60
  21. 15
  22. 40
  23. 2316
  24. 30
  25. 65
  26. 1484
  27. 10
  28. 25
  29. 15
  30. 864
  31. 2834
  32. 3108
  33. 2159
  34. 2890
  35. 8
  36. 56
  37. 2632
  38. 3180
  39. 54
  40. 1990

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