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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 734 · 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 360 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹4480 to ₹6272. By what percent did it go up?
  3. 3.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  4. 4.A shop sells 2760 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  5. 5.A water tank holds 3280 litres. 5% of the water is used. How many litres are left?
  6. 6.A town has 860 people. Its population grows by 25%. How many people live there now?
  7. 7.A water tank holds 3720 litres. 10% of the water is used. How many litres are left?
  8. 8.A town has 1000 people. Its population grows by 15%. How many people live there now?
  9. 9.The price of a bicycle is ₹2980. It goes up by 25%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹2700 to ₹2160. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹4620 to ₹5313. By what percent did it go up?
  12. 12.A water tank holds 2220 litres. 5% of the water is used. How many litres are left?
  13. 13.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  16. 16.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  17. 17.A water tank holds 2080 litres. 40% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹4740 to ₹3555. By what percent did it come down?
  19. 19.A water tank holds 1600 litres. 15% of the water is used. How many litres are left?
  20. 20.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  21. 21.The price of a school bag changes from ₹4120 to ₹3708. By what percent did it come down?
  22. 22.A shop sells 4220 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹2560 to ₹2944. By what percent did it go up?
  24. 24.A town has 4800 people. Its population grows by 50%. How many people live there now?
  25. 25.A town has 1400 people. Its population grows by 5%. How many people live there now?
  26. 26.The price of a school bag changes from ₹2000 to ₹2600. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹440 to ₹220. By what percent did it come down?
  28. 28.A water tank holds 4780 litres. 25% of the water is used. How many litres are left?
  29. 29.A water tank holds 100 litres. 10% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹3480 to ₹3132. By what percent did it come down?
  31. 31.A town has 2440 people. Its population grows by 25%. How many people live there now?
  32. 32.The price of a bicycle is ₹600. It goes up by 25%. What is the new price (in ₹)?
  33. 33.A shop sells 4900 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  34. 34.A town has 1300 people. Its population grows by 50%. How many people live there now?
  35. 35.A shop sells 4780 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹1060 to ₹1166. By what percent did it go up?
  37. 37.The price of a bicycle is ₹1380. It goes up by 15%. What is the new price (in ₹)?
  38. 38.A water tank holds 1540 litres. 25% of the water is used. How many litres are left?
  39. 39.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹2240 to ₹2576. By what percent did it go up?

Answer key

  1. 342
  2. 40
  3. 33.5
  4. 2898
  5. 3116
  6. 1075
  7. 3348
  8. 1150
  9. 3725
  10. 20
  11. 15
  12. 2109
  13. 15.5
  14. 36.5
  15. 4.5
  16. 37
  17. 1248
  18. 25
  19. 1360
  20. 44
  21. 10
  22. 4642
  23. 15
  24. 7200
  25. 1470
  26. 30
  27. 50
  28. 3585
  29. 90
  30. 10
  31. 3050
  32. 750
  33. 5635
  34. 1950
  35. 5975
  36. 10
  37. 1587
  38. 1155
  39. 35
  40. 15

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