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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 855 · 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 town has 2220 people. Its population grows by 50%. How many people live there now?
  2. 2.The price of a school bag changes from ₹4540 to ₹4313. By what percent did it come down?
  3. 3.The price of a school bag changes from ₹540 to ₹432. By what percent did it come down?
  4. 4.A water tank holds 4080 litres. 40% of the water is used. How many litres are left?
  5. 5.A shop sells 4920 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹3280 to ₹2788. By what percent did it come down?
  7. 7.A shop sells 200 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  8. 8.A shop sells 1680 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.A water tank holds 140 litres. 20% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹660 to ₹594. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹880 to ₹704. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹2880 to ₹2592. By what percent did it come down?
  13. 13.A water tank holds 3660 litres. 20% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹3920 to ₹5488. By what percent did it go up?
  15. 15.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹1420. It goes up by 5%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹3200 to ₹2720. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹2100 to ₹2205. By what percent did it go up?
  19. 19.A shop sells 860 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  20. 20.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.A shop sells 4280 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  22. 22.The price of a bicycle is ₹2200. It goes up by 15%. What is the new price (in ₹)?
  23. 23.A shop sells 4980 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  24. 24.A water tank holds 1180 litres. 40% of the water is used. How many litres are left?
  25. 25.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  26. 26.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  27. 27.A water tank holds 3740 litres. 20% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹1200. It goes up by 25%. What is the new price (in ₹)?
  29. 29.The price of a bicycle is ₹3340. It goes up by 15%. What is the new price (in ₹)?
  30. 30.A water tank holds 3120 litres. 40% of the water is used. How many litres are left?
  31. 31.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  32. 32.A water tank holds 2320 litres. 5% of the water is used. How many litres are left?
  33. 33.A water tank holds 560 litres. 40% of the water is used. How many litres are left?
  34. 34.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹1060 to ₹1272. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹560 to ₹280. By what percent did it come down?
  37. 37.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹2400 to ₹2160. By what percent did it come down?
  39. 39.A shop sells 3040 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  40. 40.A town has 1480 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 3330
  2. 5
  3. 20
  4. 2448
  5. 6396
  6. 15
  7. 230
  8. 2352
  9. 112
  10. 10
  11. 20
  12. 10
  13. 2928
  14. 40
  15. 27.5
  16. 1491
  17. 15
  18. 5
  19. 1204
  20. 20.75
  21. 5136
  22. 2530
  23. 6225
  24. 708
  25. 19
  26. 44
  27. 2992
  28. 1500
  29. 3841
  30. 1872
  31. 35
  32. 2204
  33. 336
  34. 42.5
  35. 20
  36. 50
  37. 50
  38. 10
  39. 3344
  40. 1554

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