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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 496 · 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 shop sells 160 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  2. 2.A water tank holds 5000 litres. 30% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹3280 to ₹2788. By what percent did it come down?
  4. 4.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  5. 5.A water tank holds 4200 litres. 10% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹580 to ₹754. By what percent did it go up?
  7. 7.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A shop sells 4560 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.A water tank holds 660 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 3460 litres. 30% of the water is used. How many litres are left?
  11. 11.A town has 1720 people. Its population grows by 25%. How many people live there now?
  12. 12.A town has 2700 people. Its population grows by 10%. How many people live there now?
  13. 13.The price of a school bag changes from ₹3580 to ₹3401. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹680 to ₹884. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹3260 to ₹3423. By what percent did it go up?
  16. 16.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹520 to ₹364. By what percent did it come down?
  18. 18.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹3300 to ₹3960. By what percent did it go up?
  20. 20.The price of a bicycle is ₹460. It goes up by 30%. What is the new price (in ₹)?
  21. 21.A water tank holds 3840 litres. 25% of the water is used. How many litres are left?
  22. 22.A water tank holds 140 litres. 20% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹3280 to ₹1968. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹2200 to ₹1980. By what percent did it come down?
  25. 25.A water tank holds 2900 litres. 10% of the water is used. How many litres are left?
  26. 26.A town has 540 people. Its population grows by 50%. How many people live there now?
  27. 27.The price of a school bag changes from ₹3320 to ₹3984. By what percent did it go up?
  28. 28.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  29. 29.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹3940 to ₹2364. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹1720 to ₹1978. By what percent did it go up?
  32. 32.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A water tank holds 3200 litres. 50% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹3940. It goes up by 15%. What is the new price (in ₹)?
  35. 35.A water tank holds 100 litres. 20% of the water is used. How many litres are left?
  36. 36.A shop sells 260 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  37. 37.A water tank holds 3300 litres. 50% of the water is used. How many litres are left?
  38. 38.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹2660 to ₹1995. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹4360 to ₹5014. By what percent did it go up?

Answer key

  1. 168
  2. 3500
  3. 15
  4. 36.25
  5. 3780
  6. 30
  7. 37.5
  8. 6384
  9. 561
  10. 2422
  11. 2150
  12. 2970
  13. 5
  14. 30
  15. 5
  16. 95
  17. 30
  18. 26
  19. 20
  20. 598
  21. 2880
  22. 112
  23. 40
  24. 10
  25. 2610
  26. 810
  27. 20
  28. 72.5
  29. 28.75
  30. 40
  31. 15
  32. 14.5
  33. 1600
  34. 4531
  35. 80
  36. 325
  37. 1650
  38. 9.75
  39. 25
  40. 15

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