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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 723 · 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 comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  2. 2.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  3. 3.The price of a bicycle is ₹3980. It goes up by 15%. What is the new price (in ₹)?
  4. 4.A town has 1280 people. Its population grows by 50%. How many people live there now?
  5. 5.The price of a school bag changes from ₹2420 to ₹2662. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹2280 to ₹2736. By what percent did it go up?
  7. 7.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  8. 8.A town has 3180 people. Its population grows by 25%. How many people live there now?
  9. 9.The price of a school bag changes from ₹3660 to ₹5490. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹3000 to ₹1800. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹3500 to ₹2450. By what percent did it come down?
  12. 12.A shop sells 300 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  13. 13.A water tank holds 3320 litres. 50% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹1800. It goes up by 15%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹220. It goes up by 25%. What is the new price (in ₹)?
  16. 16.A water tank holds 3320 litres. 15% of the water is used. How many litres are left?
  17. 17.A shop sells 1360 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  18. 18.A water tank holds 700 litres. 40% of the water is used. How many litres are left?
  19. 19.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  20. 20.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  21. 21.A shop sells 3020 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.A water tank holds 140 litres. 30% of the water is used. How many litres are left?
  23. 23.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  24. 24.The price of a bicycle is ₹2560. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A water tank holds 380 litres. 30% of the water is used. How many litres are left?
  26. 26.A town has 1440 people. Its population grows by 30%. How many people live there now?
  27. 27.A town has 4280 people. Its population grows by 40%. How many people live there now?
  28. 28.The price of a bicycle is ₹3800. It goes up by 30%. What is the new price (in ₹)?
  29. 29.A water tank holds 4740 litres. 10% of the water is used. How many litres are left?
  30. 30.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  31. 31.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹2840 to ₹1988. By what percent did it come down?
  33. 33.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  34. 34.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  35. 35.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 2040 litres. 5% of the water is used. How many litres are left?
  37. 37.A town has 3280 people. Its population grows by 30%. How many people live there now?
  38. 38.A water tank holds 4300 litres. 40% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹440. It goes up by 10%. What is the new price (in ₹)?
  40. 40.The price of a school bag changes from ₹620 to ₹868. By what percent did it go up?

Answer key

  1. 75
  2. 70
  3. 4577
  4. 1920
  5. 10
  6. 20
  7. 58
  8. 3975
  9. 50
  10. 40
  11. 30
  12. 315
  13. 1660
  14. 2070
  15. 275
  16. 2822
  17. 1700
  18. 420
  19. 87.5
  20. 50
  21. 3322
  22. 98
  23. 27.5
  24. 2816
  25. 266
  26. 1872
  27. 5992
  28. 4940
  29. 4266
  30. 4.5
  31. 4
  32. 30
  33. 68
  34. 72.5
  35. 15.5
  36. 1938
  37. 4264
  38. 2580
  39. 484
  40. 40

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