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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 817 · 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 4700 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  2. 2.A water tank holds 3500 litres. 10% of the water is used. How many litres are left?
  3. 3.A water tank holds 4780 litres. 25% of the water is used. How many litres are left?
  4. 4.A water tank holds 760 litres. 40% of the water is used. How many litres are left?
  5. 5.A town has 2020 people. Its population grows by 20%. How many people live there now?
  6. 6.The price of a bicycle is ₹960. It goes up by 30%. What is the new price (in ₹)?
  7. 7.A town has 3000 people. Its population grows by 15%. How many people live there now?
  8. 8.The price of a school bag changes from ₹1100 to ₹1210. By what percent did it go up?
  9. 9.A water tank holds 1320 litres. 40% of the water is used. How many litres are left?
  10. 10.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.A town has 1940 people. Its population grows by 40%. How many people live there now?
  12. 12.A price comes down by 50% 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 ₹3100 to ₹4030. By what percent did it go up?
  14. 14.A water tank holds 4380 litres. 50% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹780 to ₹858. By what percent did it go up?
  16. 16.A shop sells 60 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  17. 17.A town has 3220 people. Its population grows by 5%. How many people live there now?
  18. 18.A town has 3660 people. Its population grows by 5%. How many people live there now?
  19. 19.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  20. 20.A water tank holds 1740 litres. 50% of the water is used. How many litres are left?
  21. 21.A water tank holds 4160 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a bicycle is ₹1460. It goes up by 25%. What is the new price (in ₹)?
  23. 23.A town has 1060 people. Its population grows by 30%. How many people live there now?
  24. 24.A shop sells 3440 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  25. 25.A water tank holds 1960 litres. 5% of the water is used. How many litres are left?
  26. 26.A town has 4180 people. Its population grows by 15%. How many people live there now?
  27. 27.A town has 4840 people. Its population grows by 20%. How many people live there now?
  28. 28.A water tank holds 4820 litres. 40% of the water is used. How many litres are left?
  29. 29.A shop sells 3080 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  30. 30.The price of a bicycle is ₹2720. It goes up by 30%. What is the new price (in ₹)?
  31. 31.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹4580 to ₹5267. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹2760 to ₹3174. By what percent did it go up?
  34. 34.A water tank holds 2000 litres. 50% of the water is used. How many litres are left?
  35. 35.A shop sells 4800 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹240 to ₹336. By what percent did it go up?
  37. 37.A water tank holds 480 litres. 10% of the water is used. How many litres are left?
  38. 38.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  39. 39.A water tank holds 660 litres. 15% of the water is used. How many litres are left?
  40. 40.A water tank holds 760 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 6110
  2. 3150
  3. 3585
  4. 456
  5. 2424
  6. 1248
  7. 3450
  8. 10
  9. 792
  10. 95
  11. 2716
  12. 60
  13. 30
  14. 2190
  15. 10
  16. 78
  17. 3381
  18. 3843
  19. 26
  20. 870
  21. 2496
  22. 1825
  23. 1378
  24. 3612
  25. 1862
  26. 4807
  27. 5808
  28. 2892
  29. 4620
  30. 3536
  31. 32.5
  32. 15
  33. 15
  34. 1000
  35. 7200
  36. 40
  37. 432
  38. 51
  39. 561
  40. 570

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