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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 458 · 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 town has 3180 people. Its population grows by 10%. How many people live there now?
  2. 2.A shop sells 820 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  3. 3.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  4. 4.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  5. 5.A shop sells 2980 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  6. 6.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹3540 to ₹3717. By what percent did it go up?
  8. 8.A shop sells 2500 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  9. 9.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹4520. It goes up by 5%. What is the new price (in ₹)?
  11. 11.A water tank holds 2600 litres. 5% of the water is used. How many litres are left?
  12. 12.A water tank holds 2680 litres. 5% of the water is used. How many litres are left?
  13. 13.A town has 3900 people. Its population grows by 10%. How many people live there now?
  14. 14.A water tank holds 2860 litres. 40% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2040 to ₹1938. By what percent did it come down?
  16. 16.The price of a bicycle is ₹440. It goes up by 5%. What is the new price (in ₹)?
  17. 17.A shop sells 1860 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹4800 to ₹6240. By what percent did it go up?
  19. 19.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  20. 20.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  21. 21.A town has 2220 people. Its population grows by 50%. How many people live there now?
  22. 22.A water tank holds 3600 litres. 5% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹820 to ₹984. By what percent did it go up?
  24. 24.A water tank holds 2580 litres. 10% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹1260 to ₹1386. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹580 to ₹522. By what percent did it come down?
  27. 27.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  28. 28.A water tank holds 2080 litres. 5% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹1240 to ₹1488. By what percent did it go up?
  30. 30.A water tank holds 1440 litres. 40% of the water is used. How many litres are left?
  31. 31.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.A water tank holds 3260 litres. 5% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹440 to ₹264. By what percent did it come down?
  34. 34.The price of a bicycle is ₹1500. It goes up by 5%. What is the new price (in ₹)?
  35. 35.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 1460 litres. 5% of the water is used. How many litres are left?
  37. 37.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹60 to ₹75. By what percent did it go up?
  39. 39.A shop sells 380 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  40. 40.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 3498
  2. 984
  3. 60
  4. 26
  5. 4470
  6. 4
  7. 5
  8. 2875
  9. 56
  10. 4746
  11. 2470
  12. 2546
  13. 4290
  14. 1716
  15. 5
  16. 462
  17. 2139
  18. 30
  19. 36.25
  20. 43
  21. 3330
  22. 3420
  23. 20
  24. 2322
  25. 10
  26. 10
  27. 69
  28. 1976
  29. 20
  30. 864
  31. 9.75
  32. 3097
  33. 40
  34. 1575
  35. 38
  36. 1387
  37. 96
  38. 25
  39. 570
  40. 75

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