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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 290 · 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 15% and then comes down by 10%. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹1180 to ₹1239. By what percent did it go up?
  3. 3.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  4. 4.The price of a bicycle is ₹3180. It goes up by 15%. What is the new price (in ₹)?
  5. 5.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  6. 6.A water tank holds 820 litres. 50% of the water is used. How many litres are left?
  7. 7.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  8. 8.A town has 3600 people. Its population grows by 30%. How many people live there now?
  9. 9.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  10. 10.A shop sells 160 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  11. 11.A shop sells 2680 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  12. 12.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹720 to ₹792. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹1300 to ₹1950. By what percent did it go up?
  15. 15.A shop sells 420 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  16. 16.A shop sells 1560 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹880 to ₹792. By what percent did it come down?
  18. 18.A town has 1260 people. Its population grows by 15%. How many people live there now?
  19. 19.A shop sells 1340 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  20. 20.A water tank holds 1240 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹1360. It goes up by 5%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹200 to ₹230. By what percent did it go up?
  23. 23.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  24. 24.A water tank holds 3020 litres. 25% of the water is used. How many litres are left?
  25. 25.A town has 4520 people. Its population grows by 40%. How many people live there now?
  26. 26.A shop sells 2640 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  27. 27.A water tank holds 2280 litres. 50% of the water is used. How many litres are left?
  28. 28.A water tank holds 1040 litres. 30% of the water is used. How many litres are left?
  29. 29.A shop sells 2360 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  30. 30.A water tank holds 1480 litres. 20% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹4900 to ₹4410. By what percent did it come down?
  32. 32.A water tank holds 680 litres. 25% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹4480. It goes up by 10%. What is the new price (in ₹)?
  34. 34.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  35. 35.The price of a bicycle is ₹1000. It goes up by 30%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹2740 to ₹3425. By what percent did it go up?
  37. 37.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 4800 litres. 10% of the water is used. How many litres are left?
  39. 39.A town has 300 people. Its population grows by 15%. How many people live there now?
  40. 40.The price of a school bag changes from ₹4780 to ₹7170. By what percent did it go up?

Answer key

  1. 3.5
  2. 5
  3. 52.5
  4. 3657
  5. 23.5
  6. 410
  7. 28.75
  8. 4680
  9. 37
  10. 184
  11. 2814
  12. 18.75
  13. 10
  14. 50
  15. 546
  16. 1716
  17. 10
  18. 1449
  19. 1742
  20. 1054
  21. 1428
  22. 15
  23. 43.75
  24. 2265
  25. 6328
  26. 3432
  27. 1140
  28. 728
  29. 3068
  30. 1184
  31. 10
  32. 510
  33. 4928
  34. 65
  35. 1300
  36. 25
  37. 95
  38. 4320
  39. 345
  40. 50

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