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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 236 · 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.The price of a school bag changes from ₹2960 to ₹2368. By what percent did it come down?
  2. 2.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 4780 litres. 40% of the water is used. How many litres are left?
  4. 4.A water tank holds 1040 litres. 40% of the water is used. How many litres are left?
  5. 5.A town has 2740 people. Its population grows by 50%. How many people live there now?
  6. 6.A water tank holds 4020 litres. 40% of the water is used. How many litres are left?
  7. 7.A water tank holds 4020 litres. 50% of the water is used. How many litres are left?
  8. 8.A shop sells 240 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  9. 9.A shop sells 1560 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  10. 10.The price of a school bag changes from ₹2740 to ₹2603. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹4640 to ₹3248. By what percent did it come down?
  12. 12.A shop sells 560 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  13. 13.A water tank holds 1120 litres. 50% of the water is used. How many litres are left?
  14. 14.A water tank holds 2740 litres. 30% of the water is used. How many litres are left?
  15. 15.A water tank holds 1860 litres. 25% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹3620. It goes up by 20%. What is the new price (in ₹)?
  17. 17.A town has 4560 people. Its population grows by 25%. How many people live there now?
  18. 18.A town has 4100 people. Its population grows by 5%. How many people live there now?
  19. 19.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 2000 litres. 30% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹2980 to ₹2831. By what percent did it come down?
  22. 22.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹4680 to ₹2340. By what percent did it come down?
  24. 24.A water tank holds 4020 litres. 30% of the water is used. How many litres are left?
  25. 25.A water tank holds 820 litres. 10% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹1860 to ₹1674. By what percent did it come down?
  27. 27.The price of a school bag changes from ₹4320 to ₹4752. By what percent did it go up?
  28. 28.A town has 760 people. Its population grows by 40%. How many people live there now?
  29. 29.The price of a school bag changes from ₹2140 to ₹2354. By what percent did it go up?
  30. 30.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹3540 to ₹4248. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹1100 to ₹1650. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹1040 to ₹1196. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹3020 to ₹4530. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹4320 to ₹3024. By what percent did it come down?
  36. 36.The price of a bicycle is ₹3900. It goes up by 5%. What is the new price (in ₹)?
  37. 37.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  38. 38.The price of a bicycle is ₹1100. It goes up by 20%. What is the new price (in ₹)?
  39. 39.A shop sells 940 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  40. 40.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =

Answer key

  1. 20
  2. 26.5
  3. 2868
  4. 624
  5. 4110
  6. 2412
  7. 2010
  8. 360
  9. 2340
  10. 5
  11. 30
  12. 616
  13. 560
  14. 1918
  15. 1395
  16. 4344
  17. 5700
  18. 4305
  19. 47
  20. 1400
  21. 5
  22. 3.5
  23. 50
  24. 2814
  25. 738
  26. 10
  27. 10
  28. 1064
  29. 10
  30. 82
  31. 20
  32. 50
  33. 15
  34. 50
  35. 30
  36. 4095
  37. 56
  38. 1320
  39. 1128
  40. 12.5

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