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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 851 · 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 3680 litres. 20% of the water is used. How many litres are left?
  2. 2.A water tank holds 620 litres. 10% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹4260 to ₹5112. By what percent did it go up?
  4. 4.A water tank holds 4540 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹2640 to ₹1980. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹2780 to ₹2224. By what percent did it come down?
  7. 7.A town has 4900 people. Its population grows by 25%. How many people live there now?
  8. 8.The price of a bicycle is ₹980. It goes up by 15%. What is the new price (in ₹)?
  9. 9.A shop sells 4860 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  10. 10.A water tank holds 900 litres. 30% of the water is used. How many litres are left?
  11. 11.A town has 4480 people. Its population grows by 10%. How many people live there now?
  12. 12.A shop sells 4460 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  13. 13.The price of a bicycle is ₹2880. It goes up by 15%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹1860. It goes up by 30%. What is the new price (in ₹)?
  15. 15.A water tank holds 3880 litres. 25% of the water is used. How many litres are left?
  16. 16.A town has 1240 people. Its population grows by 40%. How many people live there now?
  17. 17.The price of a bicycle is ₹2580. It goes up by 20%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹3360 to ₹2520. By what percent did it come down?
  19. 19.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  20. 20.The price of a school bag changes from ₹840 to ₹798. By what percent did it come down?
  21. 21.A water tank holds 4600 litres. 20% of the water is used. How many litres are left?
  22. 22.A water tank holds 4700 litres. 5% of the water is used. How many litres are left?
  23. 23.A water tank holds 360 litres. 10% of the water is used. How many litres are left?
  24. 24.A town has 680 people. Its population grows by 5%. How many people live there now?
  25. 25.The price of a school bag changes from ₹1340 to ₹1273. By what percent did it come down?
  26. 26.A water tank holds 3060 litres. 20% of the water is used. How many litres are left?
  27. 27.A town has 1860 people. Its population grows by 40%. How many people live there now?
  28. 28.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.A shop sells 600 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  30. 30.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹1320 to ₹1980. By what percent did it go up?
  32. 32.A water tank holds 1120 litres. 50% of the water is used. How many litres are left?
  33. 33.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  34. 34.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  35. 35.A water tank holds 2580 litres. 25% of the water is used. How many litres are left?
  36. 36.A water tank holds 2540 litres. 50% of the water is used. How many litres are left?
  37. 37.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  38. 38.The price of a school bag changes from ₹140 to ₹119. By what percent did it come down?
  39. 39.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  40. 40.A water tank holds 1200 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 2944
  2. 558
  3. 20
  4. 4086
  5. 25
  6. 20
  7. 6125
  8. 1127
  9. 5346
  10. 630
  11. 4928
  12. 4906
  13. 3312
  14. 2418
  15. 2910
  16. 1736
  17. 3096
  18. 25
  19. 55
  20. 5
  21. 3680
  22. 4465
  23. 324
  24. 714
  25. 5
  26. 2448
  27. 2604
  28. 43.75
  29. 840
  30. 3.5
  31. 50
  32. 560
  33. 46
  34. 75
  35. 1935
  36. 1270
  37. 49
  38. 15
  39. 19
  40. 1080

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