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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 230 · 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 3640 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1320 to ₹1386. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹2360 to ₹1770. By what percent did it come down?
  4. 4.The price of a school bag changes from ₹2780 to ₹3614. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹1740 to ₹1827. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹3660 to ₹3294. By what percent did it come down?
  7. 7.A water tank holds 1160 litres. 5% of the water is used. How many litres are left?
  8. 8.The price of a bicycle is ₹1520. It goes up by 20%. What is the new price (in ₹)?
  9. 9.A water tank holds 1020 litres. 15% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1300 to ₹1430. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹2400 to ₹2640. By what percent did it go up?
  12. 12.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  13. 13.A shop sells 100 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  14. 14.A town has 1740 people. Its population grows by 15%. How many people live there now?
  15. 15.A water tank holds 3400 litres. 50% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹1980 to ₹1188. By what percent did it come down?
  17. 17.The price of a bicycle is ₹3040. It goes up by 10%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹1500. It goes up by 50%. What is the new price (in ₹)?
  19. 19.A water tank holds 200 litres. 25% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹4020 to ₹3819. By what percent did it come down?
  21. 21.A water tank holds 2080 litres. 5% of the water is used. How many litres are left?
  22. 22.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  23. 23.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.The price of a bicycle is ₹3200. It goes up by 25%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹1520 to ₹1444. By what percent did it come down?
  26. 26.A shop sells 2660 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹1800 to ₹1530. By what percent did it come down?
  28. 28.A shop sells 2860 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  29. 29.A water tank holds 3500 litres. 40% of the water is used. How many litres are left?
  30. 30.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  31. 31.The price of a bicycle is ₹1320. It goes up by 20%. What is the new price (in ₹)?
  32. 32.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹1480 to ₹1332. By what percent did it come down?
  34. 34.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  35. 35.A shop sells 180 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  36. 36.A shop sells 4180 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  37. 37.The price of a bicycle is ₹3520. It goes up by 10%. What is the new price (in ₹)?
  38. 38.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  39. 39.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  40. 40.A town has 1540 people. Its population grows by 10%. How many people live there now?

Answer key

  1. 3094
  2. 5
  3. 25
  4. 30
  5. 5
  6. 10
  7. 1102
  8. 1824
  9. 867
  10. 10
  11. 10
  12. 95
  13. 120
  14. 2001
  15. 1700
  16. 40
  17. 3344
  18. 2250
  19. 150
  20. 5
  21. 1976
  22. 61
  23. 54
  24. 4000
  25. 5
  26. 3192
  27. 15
  28. 4290
  29. 2100
  30. 36.25
  31. 1584
  32. 38
  33. 10
  34. 32
  35. 216
  36. 5852
  37. 3872
  38. 75
  39. 70
  40. 1694

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