← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 220 · 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 goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  2. 2.A shop sells 3540 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  3. 3.The price of a school bag changes from ₹740 to ₹814. By what percent did it go up?
  4. 4.A water tank holds 4660 litres. 5% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1520 to ₹1216. By what percent did it come down?
  6. 6.A shop sells 2960 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  7. 7.The price of a school bag changes from ₹140 to ₹196. By what percent did it go up?
  8. 8.A town has 2820 people. Its population grows by 5%. How many people live there now?
  9. 9.A water tank holds 720 litres. 40% of the water is used. How many litres are left?
  10. 10.A water tank holds 2840 litres. 15% of the water is used. How many litres are left?
  11. 11.A water tank holds 1560 litres. 10% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹4020. It goes up by 5%. What is the new price (in ₹)?
  13. 13.The price of a school bag changes from ₹4540 to ₹3405. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹5000 to ₹2500. By what percent did it come down?
  15. 15.A shop sells 4640 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  16. 16.A water tank holds 3680 litres. 10% of the water is used. How many litres are left?
  17. 17.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  18. 18.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  19. 19.The price of a school bag changes from ₹2320 to ₹2784. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹4140 to ₹5382. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹1600 to ₹1280. By what percent did it come down?
  22. 22.A water tank holds 2600 litres. 50% of the water is used. How many litres are left?
  23. 23.A water tank holds 480 litres. 20% of the water is used. How many litres are left?
  24. 24.A town has 1600 people. Its population grows by 30%. How many people live there now?
  25. 25.A water tank holds 1840 litres. 25% of the water is used. How many litres are left?
  26. 26.A shop sells 3160 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  27. 27.A town has 3400 people. Its population grows by 30%. How many people live there now?
  28. 28.A water tank holds 3380 litres. 30% of the water is used. How many litres are left?
  29. 29.A shop sells 880 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  30. 30.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 2100 litres. 40% of the water is used. How many litres are left?
  32. 32.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 4980 litres. 50% of the water is used. How many litres are left?
  35. 35.A water tank holds 800 litres. 50% of the water is used. How many litres are left?
  36. 36.A town has 3020 people. Its population grows by 10%. How many people live there now?
  37. 37.A water tank holds 3460 litres. 10% of the water is used. How many litres are left?
  38. 38.A water tank holds 4120 litres. 25% of the water is used. How many litres are left?
  39. 39.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  40. 40.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 26.5
  2. 4071
  3. 10
  4. 4427
  5. 20
  6. 3552
  7. 40
  8. 2961
  9. 432
  10. 2414
  11. 1404
  12. 4221
  13. 25
  14. 50
  15. 6960
  16. 3312
  17. 50
  18. 52.5
  19. 20
  20. 30
  21. 20
  22. 1300
  23. 384
  24. 2080
  25. 1380
  26. 3792
  27. 4420
  28. 2366
  29. 1056
  30. 80
  31. 1260
  32. 87.5
  33. 57.5
  34. 2490
  35. 400
  36. 3322
  37. 3114
  38. 3090
  39. 4
  40. 21

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