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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 51 · 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 2080 litres. 40% of the water is used. How many litres are left?
  2. 2.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.A town has 960 people. Its population grows by 30%. How many people live there now?
  4. 4.A town has 660 people. Its population grows by 15%. How many people live there now?
  5. 5.A water tank holds 1720 litres. 20% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹4360. It goes up by 25%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹1080 to ₹1188. By what percent did it go up?
  8. 8.The price of a bicycle is ₹3260. It goes up by 20%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹3720 to ₹1860. By what percent did it come down?
  10. 10.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 2840 litres. 5% of the water is used. How many litres are left?
  12. 12.A town has 580 people. Its population grows by 25%. How many people live there now?
  13. 13.The price of a bicycle is ₹3060. It goes up by 10%. What is the new price (in ₹)?
  14. 14.A water tank holds 4520 litres. 10% of the water is used. How many litres are left?
  15. 15.A shop sells 3820 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹2960 to ₹3700. By what percent did it go up?
  18. 18.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  19. 19.A shop sells 2640 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  20. 20.A town has 4680 people. Its population grows by 30%. How many people live there now?
  21. 21.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  22. 22.A water tank holds 4460 litres. 50% of the water is used. How many litres are left?
  23. 23.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹3160 to ₹3476. By what percent did it go up?
  25. 25.The price of a bicycle is ₹1060. It goes up by 10%. What is the new price (in ₹)?
  26. 26.A water tank holds 2880 litres. 20% of the water is used. How many litres are left?
  27. 27.A water tank holds 4480 litres. 10% of the water is used. How many litres are left?
  28. 28.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 1840 litres. 20% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹1320. It goes up by 25%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹2280 to ₹2622. By what percent did it go up?
  32. 32.A town has 3340 people. Its population grows by 5%. How many people live there now?
  33. 33.The price of a school bag changes from ₹900 to ₹990. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹1260 to ₹1386. By what percent did it go up?
  35. 35.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  36. 36.A water tank holds 1480 litres. 20% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹660 to ₹759. By what percent did it go up?
  38. 38.The price of a school bag changes from ₹920 to ₹782. By what percent did it come down?
  39. 39.A water tank holds 1240 litres. 10% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹3640. It goes up by 25%. What is the new price (in ₹)?

Answer key

  1. 1248
  2. 62.5
  3. 1248
  4. 759
  5. 1376
  6. 5450
  7. 10
  8. 3912
  9. 50
  10. 26
  11. 2698
  12. 725
  13. 3366
  14. 4068
  15. 4202
  16. 57.5
  17. 25
  18. 26.5
  19. 3696
  20. 6084
  21. 58
  22. 2230
  23. 47
  24. 10
  25. 1166
  26. 2304
  27. 4032
  28. 49.5
  29. 1472
  30. 1650
  31. 15
  32. 3507
  33. 10
  34. 10
  35. 55
  36. 1184
  37. 15
  38. 15
  39. 1116
  40. 4550

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