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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 758 · 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 1800 litres. 50% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹620 to ₹806. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹4000 to ₹6000. By what percent did it go up?
  4. 4.A water tank holds 4220 litres. 25% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1360 to ₹680. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹1300 to ₹1430. By what percent did it go up?
  7. 7.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 1880 litres. 5% of the water is used. How many litres are left?
  9. 9.The price of a bicycle is ₹1760. It goes up by 40%. What is the new price (in ₹)?
  10. 10.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹1700 to ₹2040. By what percent did it go up?
  12. 12.A shop sells 1180 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  13. 13.A shop sells 2320 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  14. 14.A water tank holds 200 litres. 10% of the water is used. How many litres are left?
  15. 15.A town has 280 people. Its population grows by 50%. How many people live there now?
  16. 16.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹840 to ₹924. By what percent did it go up?
  18. 18.The price of a bicycle is ₹180. It goes up by 25%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹500 to ₹650. By what percent did it go up?
  20. 20.A water tank holds 4180 litres. 10% of the water is used. How many litres are left?
  21. 21.A water tank holds 4220 litres. 20% of the water is used. How many litres are left?
  22. 22.A shop sells 1940 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹3920 to ₹4116. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹4420 to ₹3978. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹3380 to ₹3042. By what percent did it come down?
  26. 26.A water tank holds 4260 litres. 5% of the water is used. How many litres are left?
  27. 27.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹1880 to ₹1974. By what percent did it go up?
  29. 29.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  30. 30.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  31. 31.A shop sells 180 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  32. 32.The price of a bicycle is ₹2580. It goes up by 5%. What is the new price (in ₹)?
  33. 33.A town has 4060 people. Its population grows by 10%. How many people live there now?
  34. 34.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  35. 35.A town has 4200 people. Its population grows by 40%. How many people live there now?
  36. 36.The price of a school bag changes from ₹200 to ₹240. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹2500 to ₹1500. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹440 to ₹550. By what percent did it go up?
  39. 39.A water tank holds 1100 litres. 30% of the water is used. How many litres are left?
  40. 40.A water tank holds 3280 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 900
  2. 30
  3. 50
  4. 3165
  5. 50
  6. 10
  7. 26
  8. 1786
  9. 2464
  10. 31.25
  11. 20
  12. 1475
  13. 2784
  14. 180
  15. 420
  16. 65
  17. 10
  18. 225
  19. 30
  20. 3762
  21. 3376
  22. 2037
  23. 5
  24. 10
  25. 10
  26. 4047
  27. 96
  28. 5
  29. 47
  30. 80
  31. 252
  32. 2709
  33. 4466
  34. 20.75
  35. 5880
  36. 20
  37. 40
  38. 25
  39. 770
  40. 2624

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