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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 582 · 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 ₹460 to ₹529. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹560 to ₹476. By what percent did it come down?
  3. 3.A water tank holds 4120 litres. 15% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹300 to ₹345. By what percent did it go up?
  5. 5.A shop sells 4400 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 ₹2460. It goes up by 30%. What is the new price (in ₹)?
  7. 7.A water tank holds 1820 litres. 25% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1040 to ₹1352. By what percent did it go up?
  9. 9.The price of a bicycle is ₹3860. It goes up by 20%. What is the new price (in ₹)?
  10. 10.A water tank holds 780 litres. 50% of the water is used. How many litres are left?
  11. 11.A water tank holds 1100 litres. 20% of the water is used. How many litres are left?
  12. 12.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  13. 13.A shop sells 620 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  14. 14.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹400 to ₹460. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹2720 to ₹3128. By what percent did it go up?
  17. 17.A water tank holds 1340 litres. 25% of the water is used. How many litres are left?
  18. 18.A water tank holds 1900 litres. 40% of the water is used. How many litres are left?
  19. 19.A shop sells 800 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  20. 20.A town has 4840 people. Its population grows by 5%. How many people live there now?
  21. 21.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 1900 litres. 30% of the water is used. How many litres are left?
  23. 23.A water tank holds 2840 litres. 10% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹3300. It goes up by 30%. What is the new price (in ₹)?
  25. 25.A town has 2700 people. Its population grows by 10%. How many people live there now?
  26. 26.The price of a school bag changes from ₹4200 to ₹3150. By what percent did it come down?
  27. 27.The price of a school bag changes from ₹260 to ₹234. By what percent did it come down?
  28. 28.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  29. 29.A water tank holds 1240 litres. 10% of the water is used. How many litres are left?
  30. 30.A water tank holds 3840 litres. 20% of the water is used. How many litres are left?
  31. 31.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  32. 32.A water tank holds 1620 litres. 20% of the water is used. How many litres are left?
  33. 33.A water tank holds 1940 litres. 40% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹1300 to ₹1365. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹4260 to ₹2130. By what percent did it come down?
  36. 36.A water tank holds 1640 litres. 15% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹460. It goes up by 15%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹4260 to ₹6390. By what percent did it go up?
  39. 39.A water tank holds 4680 litres. 10% of the water is used. How many litres are left?
  40. 40.A water tank holds 880 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 15
  2. 15
  3. 3502
  4. 15
  5. 5280
  6. 3198
  7. 1365
  8. 30
  9. 4632
  10. 390
  11. 880
  12. 14.5
  13. 651
  14. 61
  15. 15
  16. 15
  17. 1005
  18. 1140
  19. 1120
  20. 5082
  21. 26
  22. 1330
  23. 2556
  24. 4290
  25. 2970
  26. 25
  27. 10
  28. 17
  29. 1116
  30. 3072
  31. 44
  32. 1296
  33. 1164
  34. 5
  35. 50
  36. 1394
  37. 529
  38. 50
  39. 4212
  40. 704

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