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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 796 · 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 shop sells 1600 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  2. 2.A shop sells 3380 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  3. 3.The price of a school bag changes from ₹160 to ₹208. By what percent did it go up?
  4. 4.A water tank holds 2300 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹400. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A water tank holds 100 litres. 30% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹3780 to ₹5670. By what percent did it go up?
  8. 8.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  9. 9.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  10. 10.A town has 4000 people. Its population grows by 40%. How many people live there now?
  11. 11.A town has 1460 people. Its population grows by 40%. How many people live there now?
  12. 12.The price of a school bag changes from ₹4840 to ₹7260. By what percent did it go up?
  13. 13.A water tank holds 2260 litres. 10% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹3640 to ₹5460. By what percent did it go up?
  15. 15.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  16. 16.A shop sells 400 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹1420 to ₹852. By what percent did it come down?
  18. 18.A water tank holds 540 litres. 10% of the water is used. How many litres are left?
  19. 19.A shop sells 980 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  20. 20.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 2700 litres. 50% of the water is used. How many litres are left?
  22. 22.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  23. 23.A water tank holds 1160 litres. 25% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹2020 to ₹1818. By what percent did it come down?
  25. 25.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  26. 26.A town has 3160 people. Its population grows by 25%. How many people live there now?
  27. 27.The price of a bicycle is ₹4420. It goes up by 50%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹1560 to ₹2184. By what percent did it go up?
  29. 29.A water tank holds 3140 litres. 15% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹2280. It goes up by 20%. What is the new price (in ₹)?
  31. 31.A water tank holds 1500 litres. 10% of the water is used. How many litres are left?
  32. 32.A water tank holds 1640 litres. 5% of the water is used. How many litres are left?
  33. 33.A shop sells 2040 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹4900 to ₹4655. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹3700 to ₹5550. By what percent did it go up?
  36. 36.A water tank holds 60 litres. 10% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹1180. It goes up by 40%. What is the new price (in ₹)?
  38. 38.A water tank holds 3340 litres. 5% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹140 to ₹105. By what percent did it come down?
  40. 40.A water tank holds 660 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 2240
  2. 3887
  3. 30
  4. 2070
  5. 440
  6. 70
  7. 50
  8. 47
  9. 19
  10. 5600
  11. 2044
  12. 50
  13. 2034
  14. 50
  15. 40
  16. 460
  17. 40
  18. 486
  19. 1078
  20. 61
  21. 1350
  22. 24
  23. 870
  24. 10
  25. 36.5
  26. 3950
  27. 6630
  28. 40
  29. 2669
  30. 2736
  31. 1350
  32. 1558
  33. 2448
  34. 5
  35. 50
  36. 54
  37. 1652
  38. 3173
  39. 25
  40. 330

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