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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 629 · 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.The price of a school bag changes from ₹3780 to ₹3024. By what percent did it come down?
  2. 2.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  3. 3.A town has 4760 people. Its population grows by 15%. How many people live there now?
  4. 4.A shop sells 4840 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  5. 5.A shop sells 1080 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  6. 6.The price of a bicycle is ₹4220. It goes up by 40%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹3100 to ₹2790. By what percent did it come down?
  8. 8.A water tank holds 800 litres. 25% of the water is used. How many litres are left?
  9. 9.The price of a bicycle is ₹4440. It goes up by 10%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹160 to ₹120. By what percent did it come down?
  11. 11.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  12. 12.The price of a school bag changes from ₹2920 to ₹4380. By what percent did it go up?
  13. 13.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  14. 14.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.A town has 2360 people. Its population grows by 30%. How many people live there now?
  16. 16.A town has 2140 people. Its population grows by 10%. How many people live there now?
  17. 17.A water tank holds 4860 litres. 15% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹820 to ₹779. By what percent did it come down?
  19. 19.A shop sells 600 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.A water tank holds 3340 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4520 to ₹4068. By what percent did it come down?
  22. 22.The price of a bicycle is ₹4660. It goes up by 20%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹460 to ₹483. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹3120 to ₹4680. By what percent did it go up?
  25. 25.A water tank holds 4860 litres. 20% of the water is used. How many litres are left?
  26. 26.A water tank holds 1560 litres. 10% of the water is used. How many litres are left?
  27. 27.A water tank holds 300 litres. 40% of the water is used. How many litres are left?
  28. 28.A town has 880 people. Its population grows by 20%. How many people live there now?
  29. 29.The price of a school bag changes from ₹280 to ₹252. By what percent did it come down?
  30. 30.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  31. 31.A water tank holds 1780 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹1200 to ₹1260. By what percent did it go up?
  33. 33.A water tank holds 3080 litres. 15% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹4780 to ₹6214. By what percent did it go up?
  35. 35.A shop sells 4600 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  36. 36.A water tank holds 2300 litres. 10% of the water is used. How many litres are left?
  37. 37.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  38. 38.The price of a bicycle is ₹4120. It goes up by 10%. What is the new price (in ₹)?
  39. 39.A water tank holds 580 litres. 25% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹3100 to ₹2635. By what percent did it come down?

Answer key

  1. 20
  2. 23.5
  3. 5474
  4. 5324
  5. 1296
  6. 5908
  7. 10
  8. 600
  9. 4884
  10. 25
  11. 38
  12. 50
  13. 12.5
  14. 56
  15. 3068
  16. 2354
  17. 4131
  18. 5
  19. 630
  20. 2839
  21. 10
  22. 5592
  23. 5
  24. 50
  25. 3888
  26. 1404
  27. 180
  28. 1056
  29. 10
  30. 40
  31. 1691
  32. 5
  33. 2618
  34. 30
  35. 6440
  36. 2070
  37. 36.25
  38. 4532
  39. 435
  40. 15

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