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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 642 · 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 price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹1060 to ₹1378. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹1000 to ₹1500. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹2920 to ₹3066. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹4120 to ₹4326. By what percent did it go up?
  6. 6.The price of a bicycle is ₹980. It goes up by 5%. What is the new price (in ₹)?
  7. 7.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 2600 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 4220 litres. 50% of the water is used. How many litres are left?
  10. 10.A water tank holds 3700 litres. 15% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹2240 to ₹1120. By what percent did it come down?
  12. 12.A water tank holds 1980 litres. 30% of the water is used. How many litres are left?
  13. 13.A shop sells 1300 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  14. 14.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹4820. It goes up by 10%. What is the new price (in ₹)?
  16. 16.A shop sells 2120 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  17. 17.The price of a bicycle is ₹320. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹3540. It goes up by 30%. What is the new price (in ₹)?
  19. 19.A shop sells 2460 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  20. 20.The price of a bicycle is ₹4320. It goes up by 30%. What is the new price (in ₹)?
  21. 21.A water tank holds 600 litres. 50% of the water is used. How many litres are left?
  22. 22.A water tank holds 2980 litres. 30% of the water is used. How many litres are left?
  23. 23.A water tank holds 4660 litres. 15% of the water is used. How many litres are left?
  24. 24.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  25. 25.The price of a bicycle is ₹3500. It goes up by 25%. What is the new price (in ₹)?
  26. 26.A water tank holds 3900 litres. 20% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹440 to ₹616. By what percent did it go up?
  28. 28.The price of a school bag changes from ₹4520 to ₹6780. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹1940 to ₹2716. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹3920 to ₹2352. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹1240 to ₹1364. By what percent did it go up?
  32. 32.A shop sells 1320 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  33. 33.A water tank holds 4720 litres. 25% of the water is used. How many litres are left?
  34. 34.A shop sells 3740 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  35. 35.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 1440 litres. 5% of the water is used. How many litres are left?
  37. 37.A town has 1600 people. Its population grows by 40%. How many people live there now?
  38. 38.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  39. 39.A shop sells 4920 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  40. 40.A town has 2400 people. Its population grows by 10%. How many people live there now?

Answer key

  1. 38
  2. 30
  3. 50
  4. 5
  5. 5
  6. 1029
  7. 43.75
  8. 2470
  9. 2110
  10. 3145
  11. 50
  12. 1386
  13. 1625
  14. 68
  15. 5302
  16. 3180
  17. 368
  18. 4602
  19. 3444
  20. 5616
  21. 300
  22. 2086
  23. 3961
  24. 40.5
  25. 4375
  26. 3120
  27. 40
  28. 50
  29. 40
  30. 40
  31. 10
  32. 1650
  33. 3540
  34. 5236
  35. 87.5
  36. 1368
  37. 2240
  38. 28.75
  39. 7380
  40. 2640

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