← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 532 · 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 1860 litres. 10% of the water is used. How many litres are left?
  2. 2.A town has 3940 people. Its population grows by 50%. How many people live there now?
  3. 3.The price of a bicycle is ₹2000. It goes up by 30%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹4820 to ₹6748. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹1460 to ₹1825. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹1260 to ₹1386. By what percent did it go up?
  7. 7.The price of a bicycle is ₹2620. It goes up by 25%. What is the new price (in ₹)?
  8. 8.The price of a bicycle is ₹2260. It goes up by 20%. What is the new price (in ₹)?
  9. 9.A water tank holds 1700 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 2800 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1340 to ₹670. By what percent did it come down?
  12. 12.The price of a bicycle is ₹2780. It goes up by 25%. What is the new price (in ₹)?
  13. 13.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹1320 to ₹1056. By what percent did it come down?
  15. 15.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 3800 litres. 50% of the water is used. How many litres are left?
  17. 17.A shop sells 1180 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  18. 18.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  19. 19.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  20. 20.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹940 to ₹1175. By what percent did it go up?
  22. 22.A town has 900 people. Its population grows by 50%. How many people live there now?
  23. 23.A water tank holds 1440 litres. 30% of the water is used. How many litres are left?
  24. 24.A shop sells 4440 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  25. 25.A water tank holds 2220 litres. 25% of the water is used. How many litres are left?
  26. 26.A water tank holds 3240 litres. 50% of the water is used. How many litres are left?
  27. 27.A water tank holds 400 litres. 15% of the water is used. How many litres are left?
  28. 28.A town has 3720 people. Its population grows by 5%. How many people live there now?
  29. 29.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  30. 30.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  31. 31.A shop sells 500 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  32. 32.The price of a school bag changes from ₹1760 to ₹1056. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹2420 to ₹3630. By what percent did it go up?
  34. 34.A water tank holds 2100 litres. 25% of the water is used. How many litres are left?
  35. 35.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  36. 36.A water tank holds 2180 litres. 5% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹1440. It goes up by 50%. What is the new price (in ₹)?
  38. 38.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  39. 39.A water tank holds 1580 litres. 10% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹1400 to ₹1610. By what percent did it go up?

Answer key

  1. 1674
  2. 5910
  3. 2600
  4. 40
  5. 25
  6. 10
  7. 3275
  8. 2712
  9. 1445
  10. 2100
  11. 50
  12. 3475
  13. 26.5
  14. 20
  15. 20.75
  16. 1900
  17. 1357
  18. 96
  19. 49
  20. 5
  21. 25
  22. 1350
  23. 1008
  24. 4884
  25. 1665
  26. 1620
  27. 340
  28. 3906
  29. 3.5
  30. 26
  31. 650
  32. 40
  33. 50
  34. 1575
  35. 46
  36. 2071
  37. 2160
  38. 36
  39. 1422
  40. 15

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude