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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 738 · 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 4660 litres. 40% of the water is used. How many litres are left?
  2. 2.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹4340 to ₹2170. By what percent did it come down?
  4. 4.A water tank holds 3200 litres. 20% of the water is used. How many litres are left?
  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.A water tank holds 1500 litres. 30% of the water is used. How many litres are left?
  7. 7.A water tank holds 2520 litres. 50% of the water is used. How many litres are left?
  8. 8.A town has 1440 people. Its population grows by 20%. How many people live there now?
  9. 9.The price of a bicycle is ₹3660. It goes up by 10%. What is the new price (in ₹)?
  10. 10.A water tank holds 4540 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1540 to ₹2002. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹3680 to ₹3496. By what percent did it come down?
  13. 13.A town has 2080 people. Its population grows by 30%. How many people live there now?
  14. 14.A water tank holds 500 litres. 5% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2820 to ₹1974. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹2760 to ₹1380. By what percent did it come down?
  17. 17.The price of a school bag changes from ₹3280 to ₹1640. By what percent did it come down?
  18. 18.A town has 3600 people. Its population grows by 50%. How many people live there now?
  19. 19.The price of a bicycle is ₹1540. It goes up by 10%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹320 to ₹352. By what percent did it go up?
  21. 21.A water tank holds 1700 litres. 15% of the water is used. How many litres are left?
  22. 22.A water tank holds 4040 litres. 50% of the water is used. How many litres are left?
  23. 23.A town has 3680 people. Its population grows by 40%. How many people live there now?
  24. 24.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹3680 to ₹2208. By what percent did it come down?
  26. 26.The price of a bicycle is ₹280. It goes up by 50%. What is the new price (in ₹)?
  27. 27.A water tank holds 3860 litres. 30% of the water is used. How many litres are left?
  28. 28.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  29. 29.A water tank holds 2720 litres. 50% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹2060 to ₹3090. By what percent did it go up?
  31. 31.A water tank holds 300 litres. 50% of the water is used. How many litres are left?
  32. 32.A town has 3420 people. Its population grows by 20%. How many people live there now?
  33. 33.A town has 2700 people. Its population grows by 50%. How many people live there now?
  34. 34.A water tank holds 1780 litres. 40% of the water is used. How many litres are left?
  35. 35.A water tank holds 1240 litres. 40% of the water is used. How many litres are left?
  36. 36.A shop sells 4540 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹4100 to ₹4305. By what percent did it go up?
  38. 38.A water tank holds 1960 litres. 25% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹4820 to ₹5784. By what percent did it go up?
  40. 40.A water tank holds 3900 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 2796
  2. 37.5
  3. 50
  4. 2560
  5. 87.5
  6. 1050
  7. 1260
  8. 1728
  9. 4026
  10. 3405
  11. 30
  12. 5
  13. 2704
  14. 475
  15. 30
  16. 50
  17. 50
  18. 5400
  19. 1694
  20. 10
  21. 1445
  22. 2020
  23. 5152
  24. 21
  25. 40
  26. 420
  27. 2702
  28. 28
  29. 1360
  30. 50
  31. 150
  32. 4104
  33. 4050
  34. 1068
  35. 744
  36. 5221
  37. 5
  38. 1470
  39. 20
  40. 2925

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