← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 747 · 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 price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  2. 2.A town has 2220 people. Its population grows by 20%. How many people live there now?
  3. 3.A water tank holds 1480 litres. 40% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹2780 to ₹3197. By what percent did it go up?
  5. 5.A water tank holds 380 litres. 40% of the water is used. How many litres are left?
  6. 6.A water tank holds 3260 litres. 10% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹380 to ₹532. By what percent did it go up?
  8. 8.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  9. 9.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  10. 10.A town has 1480 people. Its population grows by 5%. How many people live there now?
  11. 11.The price of a school bag changes from ₹560 to ₹420. By what percent did it come down?
  12. 12.A water tank holds 1040 litres. 15% of the water is used. How many litres are left?
  13. 13.A water tank holds 3220 litres. 10% of the water is used. How many litres are left?
  14. 14.A shop sells 600 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  15. 15.The price of a bicycle is ₹1100. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A water tank holds 2460 litres. 15% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹4080 to ₹2448. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹1740 to ₹1914. By what percent did it go up?
  19. 19.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 2880 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹4380. It goes up by 40%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹3380 to ₹3211. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹3500 to ₹5250. By what percent did it go up?
  24. 24.A water tank holds 2680 litres. 40% of the water is used. How many litres are left?
  25. 25.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 4100 litres. 30% of the water is used. How many litres are left?
  27. 27.A town has 420 people. Its population grows by 40%. How many people live there now?
  28. 28.The price of a bicycle is ₹900. It goes up by 5%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹1540 to ₹1309. By what percent did it come down?
  30. 30.A water tank holds 3740 litres. 30% of the water is used. How many litres are left?
  31. 31.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  32. 32.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  33. 33.A shop sells 3540 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹4860 to ₹4131. By what percent did it come down?
  35. 35.A town has 1700 people. Its population grows by 40%. How many people live there now?
  36. 36.The price of a bicycle is ₹420. It goes up by 50%. What is the new price (in ₹)?
  37. 37.A town has 2940 people. Its population grows by 25%. How many people live there now?
  38. 38.A town has 4720 people. Its population grows by 15%. How many people live there now?
  39. 39.A water tank holds 3240 litres. 5% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹640 to ₹544. By what percent did it come down?

Answer key

  1. 44
  2. 2664
  3. 888
  4. 15
  5. 228
  6. 2934
  7. 40
  8. 65
  9. 33.5
  10. 1554
  11. 25
  12. 884
  13. 2898
  14. 690
  15. 1320
  16. 2091
  17. 40
  18. 10
  19. 62.5
  20. 2448
  21. 6132
  22. 5
  23. 50
  24. 1608
  25. 56.25
  26. 2870
  27. 588
  28. 945
  29. 15
  30. 2618
  31. 52.5
  32. 43
  33. 4425
  34. 15
  35. 2380
  36. 630
  37. 3675
  38. 5428
  39. 3078
  40. 15

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