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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 728 · 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 3020 litres. 20% of the water is used. How many litres are left?
  2. 2.A town has 4260 people. Its population grows by 30%. How many people live there now?
  3. 3.The price of a school bag changes from ₹3640 to ₹4186. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹440 to ₹572. By what percent did it go up?
  5. 5.The price of a bicycle is ₹120. It goes up by 50%. What is the new price (in ₹)?
  6. 6.A water tank holds 1580 litres. 5% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹1440 to ₹1512. By what percent did it go up?
  8. 8.A shop sells 1460 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 ₹4300 to ₹3225. By what percent did it come down?
  10. 10.The price of a bicycle is ₹480. It goes up by 25%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹880 to ₹968. By what percent did it go up?
  12. 12.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  13. 13.The price of a school bag changes from ₹560 to ₹476. By what percent did it come down?
  14. 14.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹2680 to ₹4020. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹3500 to ₹4025. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹3680 to ₹4784. By what percent did it go up?
  18. 18.A shop sells 3240 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  19. 19.A water tank holds 1520 litres. 30% of the water is used. How many litres are left?
  20. 20.A water tank holds 1540 litres. 10% of the water is used. How many litres are left?
  21. 21.A shop sells 1360 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹3740 to ₹5236. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹2600 to ₹3640. By what percent did it go up?
  24. 24.A water tank holds 4580 litres. 50% of the water is used. How many litres are left?
  25. 25.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  26. 26.The price of a bicycle is ₹1040. It goes up by 20%. What is the new price (in ₹)?
  27. 27.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  28. 28.A water tank holds 1260 litres. 10% of the water is used. How many litres are left?
  29. 29.A shop sells 1240 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  30. 30.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  31. 31.A town has 280 people. Its population grows by 40%. How many people live there now?
  32. 32.A town has 2940 people. Its population grows by 20%. How many people live there now?
  33. 33.A water tank holds 2220 litres. 5% of the water is used. How many litres are left?
  34. 34.A shop sells 5000 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  35. 35.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.The price of a school bag changes from ₹1380 to ₹1242. By what percent did it come down?
  37. 37.The price of a bicycle is ₹4160. It goes up by 20%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹2360 to ₹3068. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹4360 to ₹4142. By what percent did it come down?
  40. 40.A town has 740 people. Its population grows by 40%. How many people live there now?

Answer key

  1. 2416
  2. 5538
  3. 15
  4. 30
  5. 180
  6. 1501
  7. 5
  8. 1606
  9. 25
  10. 600
  11. 10
  12. 24
  13. 15
  14. 62.5
  15. 50
  16. 15
  17. 30
  18. 3888
  19. 1064
  20. 1386
  21. 1428
  22. 40
  23. 40
  24. 2290
  25. 60
  26. 1248
  27. 57.5
  28. 1134
  29. 1860
  30. 31.25
  31. 392
  32. 3528
  33. 2109
  34. 5750
  35. 64
  36. 10
  37. 4992
  38. 30
  39. 5
  40. 1036

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