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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 348 · 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.

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  1. 1.A shop sells 3800 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹220 to ₹154. By what percent did it come down?
  3. 3.A town has 520 people. Its population grows by 10%. How many people live there now?
  4. 4.A shop sells 1840 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹2380 to ₹3332. By what percent did it go up?
  6. 6.A shop sells 1200 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  7. 7.A shop sells 3160 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹2460 to ₹2337. By what percent did it come down?
  9. 9.A water tank holds 620 litres. 10% of the water is used. How many litres are left?
  10. 10.A water tank holds 3420 litres. 10% of the water is used. How many litres are left?
  11. 11.A water tank holds 1060 litres. 20% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹3660 to ₹4026. By what percent did it go up?
  13. 13.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹4580 to ₹3206. By what percent did it come down?
  15. 15.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  16. 16.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  17. 17.A shop sells 760 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹2440 to ₹3416. By what percent did it go up?
  19. 19.A shop sells 1820 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  20. 20.A water tank holds 3180 litres. 25% of the water is used. How many litres are left?
  21. 21.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹2160 to ₹1944. By what percent did it come down?
  23. 23.A town has 2580 people. Its population grows by 30%. How many people live there now?
  24. 24.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹520 to ₹390. By what percent did it come down?
  26. 26.A town has 1820 people. Its population grows by 10%. How many people live there now?
  27. 27.A shop sells 2400 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  28. 28.A shop sells 4440 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  29. 29.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹2060 to ₹2266. By what percent did it go up?
  31. 31.The price of a bicycle is ₹3260. It goes up by 5%. What is the new price (in ₹)?
  32. 32.A shop sells 4380 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  33. 33.A town has 3520 people. Its population grows by 25%. How many people live there now?
  34. 34.A water tank holds 3120 litres. 25% of the water is used. How many litres are left?
  35. 35.A water tank holds 2880 litres. 5% of the water is used. How many litres are left?
  36. 36.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  37. 37.A water tank holds 3900 litres. 40% of the water is used. How many litres are left?
  38. 38.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  39. 39.The price of a bicycle is ₹400. It goes up by 30%. What is the new price (in ₹)?
  40. 40.A water tank holds 1680 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 3990
  2. 30
  3. 572
  4. 2300
  5. 40
  6. 1440
  7. 3318
  8. 5
  9. 558
  10. 3078
  11. 848
  12. 10
  13. 55
  14. 30
  15. 32.5
  16. 50
  17. 836
  18. 40
  19. 2548
  20. 2385
  21. 4
  22. 10
  23. 3354
  24. 37
  25. 25
  26. 2002
  27. 3000
  28. 4884
  29. 38
  30. 10
  31. 3423
  32. 5037
  33. 4400
  34. 2340
  35. 2736
  36. 52
  37. 2340
  38. 43.75
  39. 520
  40. 1596

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