← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 825 · 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 town has 3640 people. Its population grows by 20%. How many people live there now?
  2. 2.A shop sells 1380 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  3. 3.The price of a school bag changes from ₹4620 to ₹2772. By what percent did it come down?
  4. 4.A water tank holds 3320 litres. 30% of the water is used. How many litres are left?
  5. 5.A shop sells 140 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  6. 6.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  7. 7.A water tank holds 2180 litres. 5% of the water is used. How many litres are left?
  8. 8.A water tank holds 1140 litres. 10% of the water is used. How many litres are left?
  9. 9.The price of a bicycle is ₹1520. It goes up by 40%. What is the new price (in ₹)?
  10. 10.A water tank holds 3320 litres. 5% of the water is used. How many litres are left?
  11. 11.A water tank holds 4740 litres. 40% of the water is used. How many litres are left?
  12. 12.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 3900 litres. 20% of the water is used. How many litres are left?
  15. 15.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹500 to ₹250. By what percent did it come down?
  17. 17.The price of a school bag changes from ₹2100 to ₹1050. By what percent did it come down?
  18. 18.A water tank holds 3880 litres. 5% of the water is used. How many litres are left?
  19. 19.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  20. 20.A water tank holds 3600 litres. 5% of the water is used. How many litres are left?
  21. 21.A town has 1740 people. Its population grows by 5%. How many people live there now?
  22. 22.A water tank holds 3620 litres. 25% of the water is used. How many litres are left?
  23. 23.A water tank holds 3300 litres. 25% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹4400 to ₹6160. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹3680 to ₹4048. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹1680 to ₹1848. By what percent did it go up?
  27. 27.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  28. 28.A water tank holds 1040 litres. 25% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹2160. It goes up by 50%. What is the new price (in ₹)?
  30. 30.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  31. 31.A shop sells 3300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  32. 32.A water tank holds 4400 litres. 5% of the water is used. How many litres are left?
  33. 33.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  35. 35.A shop sells 1960 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  36. 36.A town has 4900 people. Its population grows by 15%. How many people live there now?
  37. 37.A water tank holds 1940 litres. 5% of the water is used. How many litres are left?
  38. 38.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  39. 39.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  40. 40.The price of a school bag changes from ₹2520 to ₹2394. By what percent did it come down?

Answer key

  1. 4368
  2. 1518
  3. 40
  4. 2324
  5. 175
  6. 51
  7. 2071
  8. 1026
  9. 2128
  10. 3154
  11. 2844
  12. 61
  13. 87.5
  14. 3120
  15. 6.25
  16. 50
  17. 50
  18. 3686
  19. 27.5
  20. 3420
  21. 1827
  22. 2715
  23. 2475
  24. 40
  25. 10
  26. 10
  27. 32.5
  28. 780
  29. 3240
  30. 43
  31. 3960
  32. 4180
  33. 31.25
  34. 68
  35. 2156
  36. 5635
  37. 1843
  38. 72.5
  39. 55
  40. 5

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