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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 78 · 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.The price of a school bag changes from ₹4400 to ₹4840. By what percent did it go up?
  2. 2.The price of a bicycle is ₹1940. It goes up by 10%. What is the new price (in ₹)?
  3. 3.The price of a school bag changes from ₹80 to ₹76. By what percent did it come down?
  4. 4.A water tank holds 180 litres. 5% of the water is used. How many litres are left?
  5. 5.A water tank holds 1560 litres. 20% of the water is used. How many litres are left?
  6. 6.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  7. 7.A water tank holds 580 litres. 5% of the water is used. How many litres are left?
  8. 8.A shop sells 4980 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹1340 to ₹1005. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹3740 to ₹3927. By what percent did it go up?
  11. 11.A water tank holds 740 litres. 50% of the water is used. How many litres are left?
  12. 12.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹2440 to ₹1952. By what percent did it come down?
  14. 14.A shop sells 3780 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹1160 to ₹1334. By what percent did it go up?
  16. 16.A water tank holds 1580 litres. 5% of the water is used. How many litres are left?
  17. 17.A water tank holds 1720 litres. 5% of the water is used. How many litres are left?
  18. 18.A water tank holds 140 litres. 15% of the water is used. How many litres are left?
  19. 19.A town has 2660 people. Its population grows by 50%. How many people live there now?
  20. 20.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  21. 21.A shop sells 560 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹4300 to ₹3440. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹4680 to ₹4914. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹3320 to ₹1660. By what percent did it come down?
  25. 25.A town has 280 people. Its population grows by 50%. How many people live there now?
  26. 26.The price of a school bag changes from ₹400 to ₹600. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹1240 to ₹620. By what percent did it come down?
  28. 28.A water tank holds 3600 litres. 15% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹320 to ₹480. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹640 to ₹800. By what percent did it go up?
  31. 31.The price of a bicycle is ₹3180. It goes up by 10%. What is the new price (in ₹)?
  32. 32.A water tank holds 4620 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹3020 to ₹2114. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹1880 to ₹2256. By what percent did it go up?
  35. 35.A shop sells 2560 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  36. 36.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  37. 37.A water tank holds 280 litres. 40% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹2680 to ₹3350. By what percent did it go up?
  39. 39.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  40. 40.The price of a school bag changes from ₹1520 to ₹1596. By what percent did it go up?

Answer key

  1. 10
  2. 2134
  3. 5
  4. 171
  5. 1248
  6. 64
  7. 551
  8. 5478
  9. 25
  10. 5
  11. 370
  12. 87.5
  13. 20
  14. 4158
  15. 15
  16. 1501
  17. 1634
  18. 119
  19. 3990
  20. 36.25
  21. 616
  22. 20
  23. 5
  24. 50
  25. 420
  26. 50
  27. 50
  28. 3060
  29. 50
  30. 25
  31. 3498
  32. 4158
  33. 30
  34. 20
  35. 2816
  36. 6.25
  37. 168
  38. 25
  39. 23.5
  40. 5

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