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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 297 · 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 25% and then comes down by 50% more. By what percent has it come down in all? =
  2. 2.The price of a bicycle is ₹2040. It goes up by 10%. What is the new price (in ₹)?
  3. 3.A water tank holds 2800 litres. 30% of the water is used. How many litres are left?
  4. 4.A water tank holds 680 litres. 50% of the water is used. How many litres are left?
  5. 5.A water tank holds 1620 litres. 20% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹1480 to ₹1184. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹3380 to ₹1690. By what percent did it come down?
  8. 8.A shop sells 3840 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹780 to ₹936. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹3000 to ₹2400. By what percent did it come down?
  11. 11.A water tank holds 3400 litres. 15% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹120 to ₹84. By what percent did it come down?
  13. 13.A water tank holds 4400 litres. 50% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹320. It goes up by 5%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹860 to ₹688. By what percent did it come down?
  16. 16.A water tank holds 540 litres. 25% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹3280. It goes up by 50%. What is the new price (in ₹)?
  18. 18.A water tank holds 360 litres. 10% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹1320 to ₹1386. By what percent did it go up?
  20. 20.A water tank holds 320 litres. 40% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹2740 to ₹2329. By what percent did it come down?
  22. 22.A water tank holds 3780 litres. 10% of the water is used. How many litres are left?
  23. 23.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹2900 to ₹2755. By what percent did it come down?
  26. 26.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹3720 to ₹3348. By what percent did it come down?
  28. 28.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.The price of a bicycle is ₹2840. It goes up by 10%. What is the new price (in ₹)?
  30. 30.A water tank holds 4320 litres. 40% of the water is used. How many litres are left?
  31. 31.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  32. 32.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  33. 33.A town has 920 people. Its population grows by 40%. How many people live there now?
  34. 34.The price of a school bag changes from ₹1540 to ₹1463. By what percent did it come down?
  35. 35.A shop sells 4100 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  37. 37.A shop sells 880 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  38. 38.A water tank holds 4780 litres. 30% of the water is used. How many litres are left?
  39. 39.A water tank holds 4180 litres. 20% of the water is used. How many litres are left?
  40. 40.A shop sells 1020 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?

Answer key

  1. 62.5
  2. 2244
  3. 1960
  4. 340
  5. 1296
  6. 20
  7. 50
  8. 5376
  9. 20
  10. 20
  11. 2890
  12. 30
  13. 2200
  14. 336
  15. 20
  16. 405
  17. 4920
  18. 324
  19. 5
  20. 192
  21. 15
  22. 3402
  23. 15.5
  24. 57.5
  25. 5
  26. 10.25
  27. 10
  28. 37.5
  29. 3124
  30. 2592
  31. 27.75
  32. 19.25
  33. 1288
  34. 5
  35. 4715
  36. 26.5
  37. 1320
  38. 3346
  39. 3344
  40. 1224

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