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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 587 · 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 940 litres. 25% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹4380 to ₹5256. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹2420 to ₹1210. By what percent did it come down?
  4. 4.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  5. 5.The price of a bicycle is ₹1320. It goes up by 40%. What is the new price (in ₹)?
  6. 6.The price of a bicycle is ₹3740. It goes up by 15%. What is the new price (in ₹)?
  7. 7.A water tank holds 1520 litres. 50% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹200 to ₹230. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹1860 to ₹2325. By what percent did it go up?
  10. 10.A water tank holds 2300 litres. 5% of the water is used. How many litres are left?
  11. 11.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  12. 12.A water tank holds 1940 litres. 40% of the water is used. How many litres are left?
  13. 13.A shop sells 3840 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹3220 to ₹2898. By what percent did it come down?
  15. 15.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  16. 16.A water tank holds 1580 litres. 40% of the water is used. How many litres are left?
  17. 17.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹4820 to ₹7230. By what percent did it go up?
  19. 19.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  20. 20.A shop sells 4960 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  21. 21.A water tank holds 780 litres. 20% of the water is used. How many litres are left?
  22. 22.A shop sells 2860 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  23. 23.A water tank holds 2040 litres. 50% of the water is used. How many litres are left?
  24. 24.A water tank holds 3240 litres. 5% of the water is used. How many litres are left?
  25. 25.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  26. 26.A water tank holds 1440 litres. 5% of the water is used. How many litres are left?
  27. 27.A water tank holds 3260 litres. 20% of the water is used. How many litres are left?
  28. 28.A shop sells 3660 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  29. 29.A water tank holds 2980 litres. 20% of the water is used. How many litres are left?
  30. 30.A water tank holds 4380 litres. 50% of the water is used. How many litres are left?
  31. 31.A water tank holds 1580 litres. 20% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹4200. It goes up by 5%. What is the new price (in ₹)?
  33. 33.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹1140 to ₹1596. By what percent did it go up?
  35. 35.A town has 260 people. Its population grows by 25%. How many people live there now?
  36. 36.The price of a school bag changes from ₹4020 to ₹2814. By what percent did it come down?
  37. 37.A town has 3060 people. Its population grows by 15%. How many people live there now?
  38. 38.A shop sells 740 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  39. 39.The price of a school bag changes from ₹1180 to ₹1062. By what percent did it come down?
  40. 40.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 705
  2. 20
  3. 50
  4. 43.75
  5. 1848
  6. 4301
  7. 760
  8. 15
  9. 25
  10. 2185
  11. 35
  12. 1164
  13. 4416
  14. 10
  15. 47.5
  16. 948
  17. 49
  18. 50
  19. 26
  20. 5704
  21. 624
  22. 3289
  23. 1020
  24. 3078
  25. 46
  26. 1368
  27. 2608
  28. 4026
  29. 2384
  30. 2190
  31. 1264
  32. 4410
  33. 56
  34. 40
  35. 325
  36. 30
  37. 3519
  38. 925
  39. 10
  40. 26.5

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