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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 719 · 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 2700 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹2780. It goes up by 20%. What is the new price (in ₹)?
  3. 3.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  4. 4.A water tank holds 2580 litres. 10% of the water is used. How many litres are left?
  5. 5.A shop sells 1180 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  6. 6.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 2020 litres. 50% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹3920 to ₹5488. By what percent did it go up?
  9. 9.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹2480. It goes up by 40%. What is the new price (in ₹)?
  11. 11.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  12. 12.A shop sells 4840 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹1300 to ₹1950. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹740 to ₹370. By what percent did it come down?
  15. 15.A water tank holds 1560 litres. 5% of the water is used. How many litres are left?
  16. 16.A town has 700 people. Its population grows by 5%. How many people live there now?
  17. 17.A water tank holds 340 litres. 50% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹3500. It goes up by 50%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹1220 to ₹1830. By what percent did it go up?
  20. 20.A water tank holds 1680 litres. 40% of the water is used. How many litres are left?
  21. 21.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  22. 22.A shop sells 240 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  23. 23.A shop sells 3760 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  24. 24.A shop sells 2040 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  25. 25.The price of a school bag changes from ₹1160 to ₹1450. By what percent did it go up?
  26. 26.A water tank holds 3540 litres. 15% of the water is used. How many litres are left?
  27. 27.A water tank holds 4020 litres. 5% of the water is used. How many litres are left?
  28. 28.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  30. 30.A shop sells 980 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  31. 31.A water tank holds 1720 litres. 50% of the water is used. How many litres are left?
  32. 32.A water tank holds 2380 litres. 30% of the water is used. How many litres are left?
  33. 33.A water tank holds 740 litres. 50% of the water is used. How many litres are left?
  34. 34.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.A water tank holds 3280 litres. 40% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹340 to ₹374. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹440 to ₹418. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹4120 to ₹2884. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹1520 to ₹1140. By what percent did it come down?
  40. 40.A water tank holds 1700 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 2160
  2. 3336
  3. 6.25
  4. 2322
  5. 1652
  6. 10.25
  7. 1010
  8. 40
  9. 47
  10. 3472
  11. 65
  12. 5566
  13. 50
  14. 50
  15. 1482
  16. 735
  17. 170
  18. 5250
  19. 50
  20. 1008
  21. 75
  22. 264
  23. 4512
  24. 2550
  25. 25
  26. 3009
  27. 3819
  28. 65
  29. 62.5
  30. 1127
  31. 860
  32. 1666
  33. 370
  34. 47.5
  35. 1968
  36. 10
  37. 5
  38. 30
  39. 25
  40. 1615

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