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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 748 · 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 3920 litres. 40% of the water is used. How many litres are left?
  2. 2.A shop sells 2560 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  4. 4.The price of a school bag changes from ₹2280 to ₹1596. By what percent did it come down?
  5. 5.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  6. 6.The price of a bicycle is ₹1360. It goes up by 20%. What is the new price (in ₹)?
  7. 7.A town has 4680 people. Its population grows by 30%. How many people live there now?
  8. 8.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  9. 9.A water tank holds 3480 litres. 30% of the water is used. How many litres are left?
  10. 10.A water tank holds 4400 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹200 to ₹220. By what percent did it go up?
  12. 12.The price of a bicycle is ₹2860. It goes up by 20%. What is the new price (in ₹)?
  13. 13.A water tank holds 1920 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹2060 to ₹1957. By what percent did it come down?
  15. 15.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  16. 16.A town has 2860 people. Its population grows by 50%. How many people live there now?
  17. 17.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  18. 18.A water tank holds 3360 litres. 10% of the water is used. How many litres are left?
  19. 19.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹3740 to ₹3927. By what percent did it go up?
  21. 21.A water tank holds 640 litres. 40% of the water is used. How many litres are left?
  22. 22.A town has 4460 people. Its population grows by 15%. How many people live there now?
  23. 23.A water tank holds 540 litres. 5% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹620 to ₹589. By what percent did it come down?
  25. 25.A shop sells 4860 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  26. 26.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  27. 27.A town has 2540 people. Its population grows by 15%. How many people live there now?
  28. 28.The price of a school bag changes from ₹280 to ₹196. By what percent did it come down?
  29. 29.A water tank holds 1340 litres. 50% of the water is used. How many litres are left?
  30. 30.A water tank holds 660 litres. 25% of the water is used. How many litres are left?
  31. 31.A water tank holds 2380 litres. 5% of the water is used. How many litres are left?
  32. 32.A water tank holds 2500 litres. 50% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1980 to ₹1782. By what percent did it come down?
  34. 34.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.A shop sells 2260 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  36. 36.A shop sells 1780 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  37. 37.A water tank holds 2200 litres. 20% of the water is used. How many litres are left?
  38. 38.A town has 880 people. Its population grows by 15%. How many people live there now?
  39. 39.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  40. 40.A town has 3340 people. Its population grows by 10%. How many people live there now?

Answer key

  1. 2352
  2. 2688
  3. 40.5
  4. 30
  5. 43
  6. 1632
  7. 6084
  8. 8
  9. 2436
  10. 3300
  11. 10
  12. 3432
  13. 1344
  14. 5
  15. 9.75
  16. 4290
  17. 19.25
  18. 3024
  19. 43.75
  20. 5
  21. 384
  22. 5129
  23. 513
  24. 5
  25. 5589
  26. 47.5
  27. 2921
  28. 30
  29. 670
  30. 495
  31. 2261
  32. 1250
  33. 10
  34. 40
  35. 2938
  36. 2492
  37. 1760
  38. 1012
  39. 37
  40. 3674

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