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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 330 · 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 ₹180 to ₹189. By what percent did it go up?
  2. 2.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  3. 3.A town has 3020 people. Its population grows by 10%. How many people live there now?
  4. 4.The price of a school bag changes from ₹660 to ₹990. By what percent did it go up?
  5. 5.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹2380 to ₹2856. By what percent did it go up?
  7. 7.The price of a bicycle is ₹640. It goes up by 20%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹2960 to ₹2664. By what percent did it come down?
  9. 9.A water tank holds 3480 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 840 litres. 15% of the water is used. How many litres are left?
  11. 11.A town has 340 people. Its population grows by 30%. How many people live there now?
  12. 12.A shop sells 4300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.A water tank holds 620 litres. 40% of the water is used. How many litres are left?
  14. 14.A town has 3540 people. Its population grows by 5%. How many people live there now?
  15. 15.A shop sells 720 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹2440 to ₹3050. By what percent did it go up?
  17. 17.A water tank holds 760 litres. 40% of the water is used. How many litres are left?
  18. 18.A shop sells 200 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹4260 to ₹4686. By what percent did it go up?
  20. 20.A water tank holds 1180 litres. 10% of the water is used. How many litres are left?
  21. 21.A water tank holds 1020 litres. 5% of the water is used. How many litres are left?
  22. 22.A water tank holds 920 litres. 20% of the water is used. How many litres are left?
  23. 23.A town has 1980 people. Its population grows by 50%. How many people live there now?
  24. 24.A water tank holds 1440 litres. 40% of the water is used. How many litres are left?
  25. 25.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹400 to ₹300. By what percent did it come down?
  27. 27.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  28. 28.A water tank holds 240 litres. 40% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹4680 to ₹3510. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹1940 to ₹1455. By what percent did it come down?
  31. 31.A water tank holds 4260 litres. 15% of the water is used. How many litres are left?
  32. 32.A town has 4480 people. Its population grows by 10%. How many people live there now?
  33. 33.The price of a school bag changes from ₹1340 to ₹1675. By what percent did it go up?
  34. 34.The price of a bicycle is ₹4280. It goes up by 25%. What is the new price (in ₹)?
  35. 35.A water tank holds 2640 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹60 to ₹45. By what percent did it come down?
  37. 37.The price of a bicycle is ₹1100. It goes up by 40%. What is the new price (in ₹)?
  38. 38.A town has 4840 people. Its population grows by 15%. How many people live there now?
  39. 39.The price of a school bag changes from ₹3520 to ₹5280. By what percent did it go up?
  40. 40.A town has 2160 people. Its population grows by 20%. How many people live there now?

Answer key

  1. 5
  2. 32
  3. 3322
  4. 50
  5. 87.5
  6. 20
  7. 768
  8. 10
  9. 2958
  10. 714
  11. 442
  12. 5160
  13. 372
  14. 3717
  15. 900
  16. 25
  17. 456
  18. 220
  19. 10
  20. 1062
  21. 969
  22. 736
  23. 2970
  24. 864
  25. 56
  26. 25
  27. 26
  28. 144
  29. 25
  30. 25
  31. 3621
  32. 4928
  33. 25
  34. 5350
  35. 2508
  36. 25
  37. 1540
  38. 5566
  39. 50
  40. 2592

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