← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 894 · 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 2180 litres. 15% of the water is used. How many litres are left?
  2. 2.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  3. 3.A shop sells 1120 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  4. 4.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  5. 5.A water tank holds 1520 litres. 40% of the water is used. How many litres are left?
  6. 6.A town has 3460 people. Its population grows by 30%. How many people live there now?
  7. 7.A shop sells 140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.A water tank holds 140 litres. 10% of the water is used. How many litres are left?
  9. 9.A town has 4140 people. Its population grows by 25%. How many people live there now?
  10. 10.The price of a school bag changes from ₹2740 to ₹3562. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹60 to ₹69. By what percent did it go up?
  12. 12.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹2420 to ₹3388. By what percent did it go up?
  14. 14.The price of a bicycle is ₹1500. It goes up by 40%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹1160 to ₹1044. By what percent did it come down?
  16. 16.A water tank holds 3300 litres. 30% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹440 to ₹264. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹580 to ₹754. By what percent did it go up?
  19. 19.A water tank holds 4900 litres. 20% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹1740 to ₹1566. By what percent did it come down?
  21. 21.A town has 3500 people. Its population grows by 5%. How many people live there now?
  22. 22.The price of a bicycle is ₹3080. It goes up by 25%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹2420 to ₹1936. By what percent did it come down?
  24. 24.A town has 3300 people. Its population grows by 40%. How many people live there now?
  25. 25.A water tank holds 3880 litres. 40% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹560 to ₹616. By what percent did it go up?
  27. 27.A water tank holds 3740 litres. 5% of the water is used. How many litres are left?
  28. 28.A shop sells 3040 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  29. 29.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  30. 30.A water tank holds 2820 litres. 25% of the water is used. How many litres are left?
  31. 31.A town has 3620 people. Its population grows by 10%. How many people live there now?
  32. 32.The price of a school bag changes from ₹2140 to ₹1284. By what percent did it come down?
  33. 33.A water tank holds 3340 litres. 50% of the water is used. How many litres are left?
  34. 34.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  35. 35.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 400 litres. 50% of the water is used. How many litres are left?
  37. 37.A town has 3300 people. Its population grows by 20%. How many people live there now?
  38. 38.A water tank holds 600 litres. 30% of the water is used. How many litres are left?
  39. 39.A town has 4500 people. Its population grows by 20%. How many people live there now?
  40. 40.A town has 180 people. Its population grows by 15%. How many people live there now?

Answer key

  1. 1853
  2. 19.25
  3. 1456
  4. 72.5
  5. 912
  6. 4498
  7. 147
  8. 126
  9. 5175
  10. 30
  11. 15
  12. 37.5
  13. 40
  14. 2100
  15. 10
  16. 2310
  17. 40
  18. 30
  19. 3920
  20. 10
  21. 3675
  22. 3850
  23. 20
  24. 4620
  25. 2328
  26. 10
  27. 3553
  28. 3800
  29. 28.75
  30. 2115
  31. 3982
  32. 40
  33. 1670
  34. 62.5
  35. 87.5
  36. 200
  37. 3960
  38. 420
  39. 5400
  40. 207

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