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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 268 · 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 1400 litres. 20% of the water is used. How many litres are left?
  2. 2.A water tank holds 1000 litres. 50% of the water is used. How many litres are left?
  3. 3.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  4. 4.A town has 2860 people. Its population grows by 15%. How many people live there now?
  5. 5.The price of a school bag changes from ₹4860 to ₹5103. By what percent did it go up?
  6. 6.A shop sells 880 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹2560. It goes up by 50%. What is the new price (in ₹)?
  8. 8.A water tank holds 1220 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 780 litres. 40% of the water is used. How many litres are left?
  10. 10.A water tank holds 640 litres. 30% of the water is used. How many litres are left?
  11. 11.A water tank holds 3120 litres. 50% of the water is used. How many litres are left?
  12. 12.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  13. 13.A shop sells 1240 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹4600 to ₹3450. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹2220 to ₹2331. By what percent did it go up?
  16. 16.A water tank holds 2020 litres. 15% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3840 to ₹3648. By what percent did it come down?
  18. 18.A water tank holds 2220 litres. 5% of the water is used. How many litres are left?
  19. 19.The price of a bicycle is ₹3260. It goes up by 5%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹1640 to ₹1886. By what percent did it go up?
  21. 21.The price of a bicycle is ₹1120. It goes up by 30%. What is the new price (in ₹)?
  22. 22.A water tank holds 4780 litres. 15% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹2540 to ₹2794. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹1060 to ₹901. By what percent did it come down?
  25. 25.A water tank holds 1980 litres. 10% of the water is used. How many litres are left?
  26. 26.A town has 2360 people. Its population grows by 5%. How many people live there now?
  27. 27.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  28. 28.A water tank holds 4040 litres. 50% of the water is used. How many litres are left?
  29. 29.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹1940 to ₹970. By what percent did it come down?
  31. 31.A water tank holds 2000 litres. 20% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹4640 to ₹3480. By what percent did it come down?
  33. 33.A water tank holds 2280 litres. 5% of the water is used. How many litres are left?
  34. 34.A water tank holds 3240 litres. 10% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹2920 to ₹2190. By what percent did it come down?
  36. 36.A water tank holds 2800 litres. 20% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹780 to ₹975. By what percent did it go up?
  38. 38.A water tank holds 4180 litres. 30% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹980. It goes up by 20%. What is the new price (in ₹)?
  40. 40.A town has 3380 people. Its population grows by 10%. How many people live there now?

Answer key

  1. 1120
  2. 500
  3. 44
  4. 3289
  5. 5
  6. 1100
  7. 3840
  8. 1159
  9. 468
  10. 448
  11. 1560
  12. 792
  13. 1550
  14. 25
  15. 5
  16. 1717
  17. 5
  18. 2109
  19. 3423
  20. 15
  21. 1456
  22. 4063
  23. 10
  24. 15
  25. 1782
  26. 2478
  27. 87.5
  28. 2020
  29. 43
  30. 50
  31. 1600
  32. 25
  33. 2166
  34. 2916
  35. 25
  36. 2240
  37. 25
  38. 2926
  39. 1176
  40. 3718

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