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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 434 · 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 3760 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1120 to ₹1176. By what percent did it go up?
  3. 3.The price of a bicycle is ₹2400. It goes up by 50%. What is the new price (in ₹)?
  4. 4.A town has 3840 people. Its population grows by 25%. How many people live there now?
  5. 5.The price of a school bag changes from ₹900 to ₹1170. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹3020 to ₹2114. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹2060 to ₹2472. By what percent did it go up?
  8. 8.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  9. 9.A water tank holds 720 litres. 5% of the water is used. How many litres are left?
  10. 10.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹3140 to ₹4396. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹3780 to ₹5670. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹640 to ₹576. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹2160 to ₹1944. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹2760 to ₹1656. By what percent did it come down?
  16. 16.A water tank holds 3440 litres. 20% of the water is used. How many litres are left?
  17. 17.A town has 1400 people. Its population grows by 5%. How many people live there now?
  18. 18.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  19. 19.A town has 3640 people. Its population grows by 10%. How many people live there now?
  20. 20.The price of a school bag changes from ₹2540 to ₹1270. By what percent did it come down?
  21. 21.A town has 1180 people. Its population grows by 10%. How many people live there now?
  22. 22.A town has 3300 people. Its population grows by 5%. How many people live there now?
  23. 23.A water tank holds 3460 litres. 10% of the water is used. How many litres are left?
  24. 24.A water tank holds 3400 litres. 15% of the water is used. How many litres are left?
  25. 25.A shop sells 1240 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹4880 to ₹4392. By what percent did it come down?
  27. 27.The price of a school bag changes from ₹3200 to ₹3680. By what percent did it go up?
  28. 28.A water tank holds 2200 litres. 15% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹2700 to ₹2025. By what percent did it come down?
  30. 30.A water tank holds 4120 litres. 15% of the water is used. How many litres are left?
  31. 31.A town has 4300 people. Its population grows by 10%. How many people live there now?
  32. 32.A water tank holds 1440 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹220 to ₹253. By what percent did it go up?
  34. 34.A water tank holds 2760 litres. 20% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹680. It goes up by 5%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹720 to ₹684. By what percent did it come down?
  37. 37.A shop sells 1760 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  38. 38.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  39. 39.A water tank holds 2120 litres. 10% of the water is used. How many litres are left?
  40. 40.A water tank holds 1480 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 2256
  2. 5
  3. 3600
  4. 4800
  5. 30
  6. 30
  7. 20
  8. 24
  9. 684
  10. 37
  11. 40
  12. 50
  13. 10
  14. 10
  15. 40
  16. 2752
  17. 1470
  18. 12.5
  19. 4004
  20. 50
  21. 1298
  22. 3465
  23. 3114
  24. 2890
  25. 1488
  26. 10
  27. 15
  28. 1870
  29. 25
  30. 3502
  31. 4730
  32. 1296
  33. 15
  34. 2208
  35. 714
  36. 5
  37. 2640
  38. 3.5
  39. 1908
  40. 740

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