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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 968 · 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 25% and then goes up by 15% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 4340 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2860 to ₹1430. By what percent did it come down?
  4. 4.The price of a bicycle is ₹3140. It goes up by 5%. What is the new price (in ₹)?
  5. 5.A town has 3380 people. Its population grows by 30%. How many people live there now?
  6. 6.The price of a school bag changes from ₹1300 to ₹910. By what percent did it come down?
  7. 7.A water tank holds 5000 litres. 40% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1800 to ₹1260. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹3460 to ₹3114. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹2200 to ₹1540. By what percent did it come down?
  11. 11.A water tank holds 3520 litres. 20% of the water is used. How many litres are left?
  12. 12.A town has 4700 people. Its population grows by 50%. How many people live there now?
  13. 13.A water tank holds 1980 litres. 5% of the water is used. How many litres are left?
  14. 14.A water tank holds 2780 litres. 40% of the water is used. How many litres are left?
  15. 15.A water tank holds 600 litres. 20% of the water is used. How many litres are left?
  16. 16.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹180 to ₹162. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹4880 to ₹3416. By what percent did it come down?
  19. 19.A shop sells 1300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  20. 20.The price of a bicycle is ₹2820. It goes up by 20%. What is the new price (in ₹)?
  21. 21.The price of a school bag changes from ₹100 to ₹125. By what percent did it go up?
  22. 22.A water tank holds 2280 litres. 50% of the water is used. How many litres are left?
  23. 23.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 1120 litres. 5% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹1420. It goes up by 10%. What is the new price (in ₹)?
  26. 26.A town has 1380 people. Its population grows by 25%. How many people live there now?
  27. 27.A water tank holds 340 litres. 20% of the water is used. How many litres are left?
  28. 28.A town has 2020 people. Its population grows by 20%. 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 water tank holds 920 litres. 5% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹4920. It goes up by 10%. What is the new price (in ₹)?
  32. 32.A water tank holds 4560 litres. 40% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1440 to ₹1872. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹2920 to ₹2482. By what percent did it come down?
  35. 35.A water tank holds 3320 litres. 20% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹660 to ₹528. By what percent did it come down?
  37. 37.A shop sells 340 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹2020 to ₹2121. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹920 to ₹966. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹4300 to ₹3010. By what percent did it come down?

Answer key

  1. 43.75
  2. 3689
  3. 50
  4. 3297
  5. 4394
  6. 30
  7. 3000
  8. 30
  9. 10
  10. 30
  11. 2816
  12. 7050
  13. 1881
  14. 1668
  15. 480
  16. 32
  17. 10
  18. 30
  19. 1690
  20. 3384
  21. 25
  22. 1140
  23. 36.5
  24. 1064
  25. 1562
  26. 1725
  27. 272
  28. 2424
  29. 3.5
  30. 874
  31. 5412
  32. 2736
  33. 30
  34. 15
  35. 2656
  36. 20
  37. 510
  38. 5
  39. 5
  40. 30

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